topic Re: Mozilla Thunderbird issues with Outlook Accounts in Discussions

Mozilla Thunderbird issues with Outlook Accounts

Mizar — Wed, 21 Jan 2026 14:07:59 GMT

I'm not really sure if this is the right place to have this addressed but i'm having issues with Outlook email accounts in Mozilla Thunderbird.

Apparently is keeps on asking for the password even though it has been memorized.

The version number is

115.7.0 (64-bit)

Re: Mozilla Thunderbird issues with Outlook Accounts

sisiThe — Thu, 25 Jan 2024 19:50:16 GMT

Same problem, just started a few days ago. Outlook pop imap are not accepted by Thunderbird anymore.

Microsoft activated a protection since the last virus attack on their server?

Re: Mozilla Thunderbird issues with Outlook Accounts

Murkalael — Thu, 25 Jan 2024 21:31:50 GMT

Started to me as well since last Wednesday

Re: Mozilla Thunderbird issues with Outlook Accounts

aqasoft — Thu, 25 Jan 2024 22:30:42 GMT

Plus one here... To be precise, it is happening since yesterday 2024-01-24, and with two hotmail accounts that I have configured in Thunderbird to be downloaded using POP. My setup has been working since years ago without modifications.

Re: Mozilla Thunderbird issues with Outlook Accounts

Theo_B — Fri, 26 Jan 2024 04:26:05 GMT

Same problem for me. No connection to Hotmail and Outlook. After I clicked away the message that the password was wrong four times (repeat), emails are fetched. But then the message comes up that the server is down. This is since update to 115.7.0 (64-Bit)

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Fri, 26 Jan 2024 05:09:41 GMT

Hello

IMAP
outlook.office365.com 993 SSL/TLS Mot de passe normal
outlook.office365.com 587 STARTTLS Mot de passe normal
POP
outlook.office365.com 995 SSL/TLS Mot de passe normal
outlook.office365.com 587 STARTTLS Mot de passe normal

115.7.0 for my part checked yesterday and today at instants t that's ok

Re: Mozilla Thunderbird issues with Outlook Accounts

sisiThe — Fri, 26 Jan 2024 05:44:59 GMT

Yes, it works now... Microsoft is freaking out about something... 😋

Re: Mozilla Thunderbird issues with Outlook Accounts

swana2k — Fri, 26 Jan 2024 09:34:34 GMT

Also same here, interestingly though I have 2 hotmail.com accounts which are no longer syncing but I also have an Outlook.com which IS still syncing fine.

All 3 accounts are configured using IMAP settings.

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Fri, 26 Jan 2024 10:13:21 GMT

Those are my settings and still the error pops up.

Re: Mozilla Thunderbird issues with Outlook Accounts

sisiThe — Fri, 26 Jan 2024 13:38:30 GMT

It stop working again this morning.... 🙄

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Fri, 26 Jan 2024 16:48:35 GMT

Something is afoot...

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Fri, 26 Jan 2024 17:12:17 GMT

I have the same problem with Thunderbird, even when it is updated to the latest version.

Thunderbird seems to have changed the login process to Hotmail. They have changed the password option to "OAuth2" on all of my two Hotmail accounts.

The correct login option is "Normal Password", I had to change it back on both the SMTP and Server settings for both accounts.

Leaving it on "OAuth2" leads to Outlook sayings login is disabled, due to the fact that you have not allowed your browser to receive or store cookies!

When I changed it back, I still get the error that the password has failed from Thunderbird, and a request to retry!

BUT IT THEN SENDS AND RECIEVES EMAILS!

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Fri, 26 Jan 2024 17:46:08 GMT

Hello

An old topic
https://forums.mozfr.org/viewtopic.php?t=152124

An support
Microsoft OAuth Authentication and Thunderbird in 2023
https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202

About cookies
Similar support https://support.mozilla.org/en-US/kb/automatic-conversion-google-mail-accounts-oauth20

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Fri, 26 Jan 2024 19:05:19 GMT

So, I've found the answer (hopefully...) changing authentication method to OAuth2 on both servers solves the issue.

You will be asked to reenter your password and allow account acess to Thunderbird but after that's done it will be happy sails. (hopefully...)

Re: Mozilla Thunderbird issues with Outlook Accounts

sisiThe — Fri, 26 Jan 2024 20:34:04 GMT

It was still not working so I made the changes you propose, and it worked! Hopefully, it will last...

Re: Mozilla Thunderbird issues with Outlook Accounts

Ximo — Fri, 26 Jan 2024 20:40:33 GMT

Your solution worked for me, thanks!

Re: Mozilla Thunderbird issues with Outlook Accounts

Murkalael — Fri, 26 Jan 2024 21:26:38 GMT

Will be doing some testing, but so far seems to be working, thanks.

Re: Mozilla Thunderbird issues with Outlook Accounts

Murkalael — Sat, 27 Jan 2024 15:30:22 GMT

Here's an update. Today went check e-mail and while I changed authentication method for OAuth2, client said server don't support current authentication method, so I changed it back to Normal Password and the old issue returned.

Re: Mozilla Thunderbird issues with Outlook Accounts

SickandTired — Sat, 27 Jan 2024 15:51:17 GMT

I have had Oauth2 from the start and it still does not work. Getting really frustrated.

Between this issue and Unified Folders chocking and severely lagging unless I move most messages to Archive, and the super temperamental TBSync, I am just about ready to throw in the towel and go back to Outlook. Ever since I moved to Thunderbird, I have that feeling that my entire email and calendar set up is like an old junker barely held together with duct tape and rubber cords that need constant attention to just barely function...

Re: Mozilla Thunderbird issues with Outlook Accounts

Carmeline — Sat, 27 Jan 2024 16:37:14 GMT

Be sure to check that you are using the current IMAP server, if you are still using the old imap-mail.outlook.com it doesn't support OAuth2. I had to change it to outlook.office365.com and then set the OAuth2 as authentication method for it to work.

Re: Mozilla Thunderbird issues with Outlook Accounts

richk — Sat, 27 Jan 2024 16:59:53 GMT

I've been seeing the failed login issue the last few days too. The simple answer for me was just to click the 'retry' button - after which everything was fine. But the problem returns the next time I restart TBird. So far just a minor inconvenience.

BUT... The problems here apparently are very dependent on whether your MS email account is a work/school account or personal one. As far as using OAuth2 goes, apparently that's now required by MS for work/school accounts, but not yet (?) supported for personal accounts (outlook/hotmail/365).

Since I have a personal account, I'm using 'Normal password' authentication for both IMAP and SMTP servers. I've told TBird to use SSL/TLS for IMAP, but can't get that to work for SMTP, so use STARTTLS there. I've got two-step verification enabled, so the password I use in TBird is an 'app password' (see the Microsoft link) Note that when you change at least some of these mail server settings in TBird, they don't take effect until you restart the program.

See the Mozilla support link for suggestions for different situations.

ref:
* https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202
* https://support.microsoft.com/en-us/account-billing/using-app-passwords-with-apps-that-don-t-support-two-step-verification-5896ed9b-4263-e681-128a-a6f2979a7944

Re: Mozilla Thunderbird issues with Outlook Accounts

WanderingTravel — Sat, 27 Jan 2024 18:02:32 GMT

No matter what I do, I cannot get TB to accept my outlook account's credentials(3 of them). I am continually assaulted by TB to provide passwords. This seems to happen so often and it is becoming very grating to use TB, at this point I have to login to webmail to even see if I get e-mails.

Re: Mozilla Thunderbird issues with Outlook Accounts

Aciotti3 — Sat, 27 Jan 2024 20:25:35 GMT

It seems to be an issue on Outlook's end. Especially if you have 2 3rd party clients trying to read from your outlook account (like Thunderbird on your comp and other one on a mobile device).

Per Microsoft help site:

"You may receive a connection error if you configured your Outlook.com account as IMAP in multiple email clients. We’re working on a fix and will update this article when we have more information. For now, try the following workaround:"

https://support.microsoft.com/en-us/office/pop-imap-and-smtp-settings-for-outlook-com-d088b986-291d-42b8-9564-9c414e2aa040

Re: Mozilla Thunderbird issues with Outlook Accounts

Murkalael — Sat, 27 Jan 2024 21:50:14 GMT

That as the missing piece of the puzzle, so you will need the OAuth2 and the outlook.office365.com for the new setting, now everything is back to normal. Thanks.

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Sun, 28 Jan 2024 08:45:49 GMT

I have tried logging in from mobile and it is not a problem, as long as the mobile is verified. I only use the browser, not a mail client.

I tried using OAth0 on a windows 10 machine and is does not work. It throws up errors saying your browser does not accept cookies, therefore your client is disabled!

My browser should not be involved.

Another tip when you get a password failure dialogue, is to press F5 (refresh), then you get the messages downloaded and you can press cancel on thunderbird's error message.

I have no problem logging into my mail using OWA method via the Opera Browser, so the problem is with Thunderbird. The OWA method means that you have to have multiple windows open for more than one account, which is why we use Thunderbird.

Mozilla connect have made several suggestions as to how this should be resolved.

But they have not yet admitted they know what the problem is in Thunderbird, that only occurred recently, without nay user changes.

Very frustrating when you have to fight your mail client everyday!

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Sun, 28 Jan 2024 12:22:58 GMT

Interesting, mine is a personal account and OAuth2 worked, have you changed the servers to outlook.office365.com as @Carmeline and @Murkalael suggested?

Re: Mozilla Thunderbird issues with Outlook Accounts

69bertie — Sun, 28 Jan 2024 10:22:46 GMT

Thankfully I've found this thread. Same problem as above but I've had to jig around some settings... here with 'outlook.office365.com' being new (for me at any rate) as the server. But 'OAuth2' is also certainly part of the re-jig and it works. I was actually logged into my MS account while setting up Thunderbird for the godknows how many attempts (over the past few days). Like others, all I had been getting was password errors - unable to log in etc. Mobile phone access was fine as was logging in direct via a browser.

But today, on setting up Thunderbird I got another window open, which basically said allow Thunderbird access, message then came via the Microsoft Authenticator and, well I nearly fell off the chair. Finally things are happening again. Peace once again!

Re: Mozilla Thunderbird issues with Outlook Accounts

FeelsGouda — Sun, 28 Jan 2024 11:58:25 GMT

Created an account just to say that it works and to thank you 🙂

Re: Mozilla Thunderbird issues with Outlook Accounts

Aciotti3 — Sun, 28 Jan 2024 14:40:53 GMT

You wouldn't have a problem logging in on your phone through the browser, nor did I. MS specifically stated if using "email clients", so not the browser. I'm also betting that doesn't include the Outlook email client app. But any other email apps would be included. And since I had T-Bird and another one on my phone trying to read from it, that would make it "multiple clients" as they stated.

Deleted my accounts for my Outlook email from T-Bird and my phone yesterday then re-added them using OAuth instead of just password. Haven't had the authenticate failure message yet. But it was a bit intermittent for me. Looking good so far though.

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Sun, 28 Jan 2024 14:42:36 GMT

I have three screenshots, but Mozilla will only allow me to upload one at a time!

This one shows the error if it is set to OAthu2

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Sun, 28 Jan 2024 14:44:16 GMT

This is my server settings for AOth2 which fail. For anyone asking if they are set to outlook.office365.com

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Sun, 28 Jan 2024 14:45:08 GMT

This is my SMTP setting on OAuth2 which also fail.

Re: Mozilla Thunderbird issues with Outlook Accounts

Aciotti3 — Sun, 28 Jan 2024 14:54:24 GMT

Something to check if you haven't adjusted the settings, not the "account settings", the T-Bird settings -> Privacy & Security

Accept Cookies from Sites

Accept 3rd Party Cookies

Make sure that you are allowing cookies. If you don't want 3rd party cookies (I have mine sent to Never), just be sure to live.com as an exception and such so it will allow their cookies at least.

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Sun, 28 Jan 2024 16:39:39 GMT

Thanks for the info.

I could tick the "Accept Cookies from Sites" in options/Privacy & Security of Thunderbird, not account settings.

I also had to set an exclusion for "live.com" which is Outlook.

Then I reset the login account settings to OAuth2 for SMTP and Server Settings.

Then I restarted Thunderbird.

Microsoft Outlook then insisted that I sign in using Microsoft's own login for each account, including the password.

Then I got a please agree form from Microsoft to accept Thunderbird as a app which can access my email etc.

Each Account had to be signed in separately.

I then had to wait for Microsoft to send an email and confirm that Thunderbird now had access to my data.

Mozilla really needs to update their Thunderbird support and user information with these details! and not try and impose it on users without telling them!

Re: Mozilla Thunderbird issues with Outlook Accounts

richk — Sun, 28 Jan 2024 21:58:55 GMT

Since the app password technique was working for me, I initially didn't work too hard trying to force OAuth2; but I am pretty sure I read notes from MS saying that OAuth wasn't supported yet for personal accounts, which agreed with some of the error messages I got when I tried it. Evidently those notes were out of date, as you've discovered, it IS now supported, and I did eventually get it working too.

I ended up going a different route than others here have used. I removed my existing outlook account from TBird, then added it back in. That wasn't 100% straitforward either, but wasn't TOO bad. Use the new Account Setup Wizard (for an existing email account) choose the default IMAP configuration (which agrees with what people here are suggesting), but hit the configure manually button. Then switch the IMAP and SMTP Authentication methods to OAuth2. Hit Done, and you'll get the normal oauth web dialog pop up where you log in to your Outlook account, and then everything's good to go.

You may have to tell TBird to allow cookies from the proper MS domain too, but I don't think I did this when I installed to my laptop, and it still worked - but maybe I'm mistaken about that.

Re: Mozilla Thunderbird issues with Outlook Accounts

swana2k — Mon, 29 Jan 2024 12:07:25 GMT

Hi All,

Having same issue myself with syncing Hotmail accounts through TBird - currently using IMAP with connection security SSL/TLS and Normal Password.
Checked my cookie settings and they are set to accept.

Is there a verified solution to this? Do I need to change security settings?

Edit: I just found this, so M$ acknowledge they're investigating the issue!
https://support.microsoft.com/en-us/office/outlook-and-other-apps-are-unable-to-connect-to-outlook-com-f4202ebf-89c6-4a8a-bec3-3d60cf7deaef

Thanks

Re: Mozilla Thunderbird issues with Outlook Accounts

intanet — Mon, 29 Jan 2024 18:49:52 GMT

This is the best we can hope to do here? To just say "same" with no fix from Mozilla? Well, at least we now all know that it's not an isolated situation. This happened to me about a week ago and, just prior to the 115.7 update. I then applied the 115.7 update thinking the fix was in that version. It wasn't. For me, as with so many others here, this continues and, at times, blocks me from access to my email accounts after about 6 tries of me putting in the already saved password in the box. Other times, it does go through after many "retry" attempts and entering the password manually again and again.

Re: Mozilla Thunderbird issues with Outlook Accounts

richk — Mon, 29 Jan 2024 23:54:14 GMT

To be fair, you've got to give TBird devs time to catch up with whatever changes Microsoft and other email providers make. TBird is a free product after all. Many of the people working on it may be volunteers.

For a personal (not a work/school) account, these settings are working for me on Windows 11 using version 115.7.0 (64-bit):

In Account Settings/<account name>/Outgoing Server (SMTP) (bottom of page)

Outgoing Server (SMTP): [choice shown is labeled:] "Outlook.com (Micorosoft) - smtp.office365.com"
(the label isn't necessarily important, the settings you see if you hit "Edit SMTP server..." are what matters)
Hit "Edit SMTP server" to see and/or edit values

Description: <whatever you or TBird called it>
Server Name: smtp.office365.com
Port: 587
User Name: <your email address>
Authentication method: OAuth2
Connection Security: STARTTLS

In Account Settings/<account name>/Server Settings

Server type: IMAP Mail Server
Server name: outlook.office365.com Port:993
User Name: <your email address>
Security Settings:
Connection security: SSL/TLS
Authentication method: OAuth2

Also, in Account Settings/Outgoing Server (SMTP), there's a table of all the SMTP servers. Make sure there's only one for smtp.office365.com. I had found two, one of which still had 'normal password' for authentication method, which I didn't want any longer, since I only want to use OAuth2 for this email account.

Note that after changing the settings you probably have to restart TBird for them to take effect.

If you have these settings, and it still doesnt work, try adding cookie exceptions (I'm not entirely sure this is necessary, but it shouldn't hurt):
Open Settings/Privacy & Security/Web Content/Exceptions
Add an exception to Allow "live.com" if its not already there.

If it still doesn't work, you could try letting TBirds new account Wizard re-add your email account.
I myself did the following:

Since all my emails are on the server, I removed my existing email account from TBird. Removing the account also removes any TBird customizations that were made for that account (for example "Message Filters"), so I made notes of anything like that which I wanted to restore later.

IMPORTANT - I'm not a TBird expert, just another user, so I certainly can't guarantee that something important might not be lost if/when an account is removed from TBird. I didn't lose anything, but other people's setup might be very different than mine. Only do this if you accept full responsibility for any and all possible consequences.

(Actually, I don't know enough about how TBird works, but possibly you could just add your email account in a second time without first removing the original instance. )

If you decide to remove your account, the 'remove account' button is found on the Account Settings page. Select the account, then hit the 'Account Actions' drop down near the bottom of the page.
I added the email acount back into TBird, using the Wizard.
*   Menu/New Account/Existing Email
*   Filled in name/email/password and checked the remember password box, then hit continue. It came back saying "Cofiguration found in Mozilla database", and had the IMAP pane selected with values matching those shown above. You can't see it at this point, but that default config is using "normal password", and I want OAuth. (so don't hit Done yet.)
*   Hit 'Configure Manually', then changed the Authentication Method for both the IMAP and SMTP server to "OAuth2". Then hit Done.
*   At this point I believe I got the normal oauth web dialog pop up where you log in to your Outlook account, and everything worked fine from then on.

Re: Mozilla Thunderbird issues with Outlook Accounts

thebarbers — Tue, 30 Jan 2024 17:07:48 GMT

Same problem here.

Re: Mozilla Thunderbird issues with Outlook Accounts

thebarbers — Tue, 30 Jan 2024 17:10:06 GMT

s anyone working on the problem

Re: Mozilla Thunderbird issues with Outlook Accounts

sisiThe — Tue, 30 Jan 2024 18:14:38 GMT

I have an office 365 account, not free. It's working very well.

Outgoing Server (SMTP): Microsoft - smpt.office365.com (default) Port 587
Connection Security (SMTP): STARTTLS
Authentification (SMTP): OAuth2

=====

Server Name: outlook.office365.com port 993
Connection Security: SSL/TLS
Authentification: OAuth2

Re: Mozilla Thunderbird issues with Outlook Accounts

Russ_Smith — Tue, 30 Jan 2024 19:05:28 GMT

I have this problem with the Hotmail account. I have reset the password to verify it was not a forgotten problem, have logged into webmail with no problem, and have checked the imap settings on the Thunderbird help site. I am not using two-factor authentication either, so that issue should not be present. Are you sure your server settings are right?

Russ Smith

My work address uses a microsoft365 account, and I have put in separate credentials for both, but every time I try to send a work email I wind up it tries to send from my hotmail account.

I have also

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Tue, 30 Jan 2024 22:13:38 GMT

Change normal password to OAuth2.

Re: Mozilla Thunderbird issues with Outlook Accounts

Russ_Smith — Tue, 30 Jan 2024 22:31:20 GMT

Thanks, I will try that.

Re: Mozilla Thunderbird issues with Outlook Accounts

Russ_Smith — Tue, 30 Jan 2024 22:42:23 GMT

I tried it, and got a Thunderbird message in the lower RH corner that the server imap-mail.outlook.com does not support OAuth and to change my security choice. So, I guess I get to try all of them possibly. Or wait for M$ to solve the problem. Swan2k posted a link to that. I also notice that the change to a different address is indicated elsewhere. I intend to keep investigating. Thanks for the advice.

Re: Mozilla Thunderbird issues with Outlook Accounts

Russ_Smith — Tue, 30 Jan 2024 23:08:01 GMT

Your suggestions, plus my password change, have worked for the time being. The server change and the STARTTLS appear to work. Now let's see if it gets confused with my work email which was happening earlier,since one is Hotmail and the other is an outlook address for my employer. Earlier, when I changed my Hotmail, it was asking me for my work credentials to send email from that rather than from my hotmail account. I checked, and the email addresses were correct in the SMTP.

Re: Mozilla Thunderbird issues with Outlook Accounts

Russ_Smith — Tue, 30 Jan 2024 23:14:27 GMT

I did the OAuth2, but also had to change the address to outlook.office365.com, and the verification method to STARTTLS or something like that. What is interesting, is that Rick said below,

This will be a problem, because then I have to choose sending with one or the other, and putting a "reply-to" in it. Microsoft says they are having multiple imap connections problems right now, and "are working on it".

Re: Mozilla Thunderbird issues with Outlook Accounts

intanet — Tue, 30 Jan 2024 23:42:01 GMT

Thank you for your very detailed instructions. I changed the server in "Edit SMTP Server" to "SMTP.office365.com" as, it was originally set as "smtp-mail.outlook.com".
There was no "OAuth2" as an authentication method in "SMTP server" options. Then, in server settings, I changed the server name there too to "outlook.office365.com". I did set the Authentication to Oauth2 in Server settings but, (as has happened to me before) another window popped up from microsoft asking for a password but, when I put in the password in there, it said "sign in was blocked" so, back to "normal" authentication.

Also, before I found THIS thread, I had been searching online for about a week and found other threads that went back a couple of years concerning people having this same problem. This was one of the troubleshooting tips I did from one of those websites...I removed all saved passwords, rebooted the program and even my computer and then, I re entered each one manually checking the option to save them again but that didn't help.
Anyhow, I have multiple email addresses in Tbird so, I'll see if changing the server on one of them will improve things.

Thanks again for the time you spent posting all that information.

Re: Mozilla Thunderbird issues with Outlook Accounts

intanet — Tue, 30 Jan 2024 23:49:45 GMT

Thanks. Yeah, I just changed them to "SMTP.office365.com" as per RichK's recommendations. I'll have to give it some time to see if it works.

Re: Mozilla Thunderbird issues with Outlook Accounts

Russ_Smith — Tue, 30 Jan 2024 23:59:40 GMT

Note that the address I used (still working I hope) is outlook.office365.com and a default port of 143.

The only thing I know I didn't tell you is that I had my webmail open to hotmail at the time I was fiddling with this. Sometimes if you are getting hit with hackers (about a dozen today) they want you to change the password,and I had to do that when I tried to log in. Also, the OAuth2 is available if you go to STARTTLS login on your connection security settings.

As i said, send is not working right now for Hotmail since TBird won't let me have two office365 sending addresses. I might have to mess with identities if I get desperate.

I wish you luck. See RickK below for even better settings, etc.

Re: Mozilla Thunderbird issues with Outlook Accounts

intanet — Wed, 31 Jan 2024 00:04:57 GMT

Thank you Russ. Well, at least I can send email. I just tested it after reading your post. I had to sign in again but, anyhow...

I also clicked the link that was posted here and read some of the Microsoft article where they acknowledge problems with apps signing into Outlook at this time so, hopefully they get to fixing that.

Re: Mozilla Thunderbird issues with Outlook Accounts

rraud — Wed, 31 Jan 2024 18:39:45 GMT

In my case with 'Hotmail,' as was previously mentioned, I went to Tools> Options> Security> Saved Passwords' and deleted the passwords for Hotmail. Closed and reopened T'bird, and when asked, re-entered relieve/send password. It seems to have resolved the issue. at least temporarily.. or it is a coincidence and MS/Outlook fixed it on their end. I have closed and opened T'bird a few times, and is seems to be normal again.

Re: Mozilla Thunderbird issues with Outlook Accounts

intanet — Sun, 04 Feb 2024 19:58:12 GMT

All righty then. As one of the fellow users of Tbird posted here, turns out, it was a problem Microsoft had to fix. I assume they fixed it as, I haven't been asked for a password in 2 days. Great. Thanks to all the fellow users of Tbird for your input.

Re: Mozilla Thunderbird issues with Outlook Accounts

JimRichmond — Mon, 12 Feb 2024 18:27:06 GMT

Since updating to this version I first had an issue with outlook mail and had to change the password security from normal to OAuth2. Today I went in and it kept asking for my GMX password and would not accept them. I tried login on the web and it worked fine. I then removed the accounts and readded them but when I tried to set up the first account it didn't accept the password. I had to enter the password again and retry creating the account before it accepted it.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Thu, 22 Feb 2024 13:42:04 GMT

This wretched problem is still ongoing. I am with Virgin Media, and using the app passwords generated in My Virgin Media for Thunderbird. Thus I'm unsure whether this is a Thunderbird or a Virgin Media problem (or a bit of both), My main Blueyonder account makes repeated requests for an IMAP password, but rejects them each time. Nevertheless, the account is successfully sending and receiving emails (if I can get emails typed in between the "paralysing" demands for password). If I generate a new app password in My Virgin Media, things seem to work normally for a while, but soon revert to the old "enter your passsword" game.

I also have the symptom that sent emails, while sending OK, are not being recorded in the "Sent" folder. I've read somewhere that the Sent folder is fed back via the imap 'mail receive' function, but can't find much info. on that.

Anyone have any further experience on all this?

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Thu, 22 Feb 2024 14:30:29 GMT

To be clear, you're using a password randomizer?

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Thu, 22 Feb 2024 14:31:58 GMT

The OAuth2 fix is specific for Outlook.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Thu, 22 Feb 2024 14:44:11 GMT

Not sure whata password randomiser is. I'm using the app password generated in My Virgin Media - these are four words separated by hyphens, and used by Virgin Media to connect to their old "orphaned" accounts, for example Blueyonder and NTLWorld accounts. The passwords do seem to work in so far as the account sends and receives emails with them, but even though they are working they keep asking all the time for the password and then rejecting it. Eventually, after a long time, the requests seem to stop. As I said, generatins a new app password in MVM seems to resolve issue, but only for a few hours or until I reboot computer. It's all very random and unpredictable...

I haven't seen any

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Thu, 22 Feb 2024 15:25:05 GMT

That's the thing, Virgin Media keeps generating new passwords Thunderbird keeps the last known passsword, so if the password keeps changing Thunderbird will ask for it because the one that's stored does not match the ones created anew.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Thu, 22 Feb 2024 16:15:50 GMT

But each time I generate a new app password in My Virgin Media I delete the old one from Thunderbird's stored passwords and enter the new one. The new one never seems to be accepted for long, and then it starts asking for another one - even though I'm still able to send and receive.

Surely Thunderbird and/or Virgin Media must be aware that this is happening?

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Thu, 22 Feb 2024 17:24:22 GMT

Ok, change the authentication method to OAuth2.

Then reenter the password.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Thu, 22 Feb 2024 19:34:55 GMT

On my Th/brd install, OAuth2 is a listed option for the imap server, but not an option for smtp server. Is this normal?

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Thu, 22 Feb 2024 20:45:34 GMT

Looking into this further, I'm picking up that Virgin Media email system does not support OAuth2. Is that right? Thunderbird is offering it as an option for imap server but not for smtp

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Thu, 22 Feb 2024 22:31:27 GMT

Thunderbird has that option for both servers.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Fri, 23 Feb 2024 01:27:38 GMT

I have this Th/brd account on two computers. For SMTP both computers only give the options - No authorisation, Normal password, Encrypted password, Kerberos/GSSAPI, and NTLM.

Am I missing something?

Thanks for your patience, Mizar

Re: Mozilla Thunderbird issues with Outlook Accounts

richk — Fri, 23 Feb 2024 04:01:36 GMT

@B - This page was started concerning Tbird problems with Microsoft Outlook Email accounts and most of the discussion is specific to that. Since you're asking about Virgin Media, you probably should have opened a new question about Virgin Media Email to avoid confusing things, ... but I'll throw in my two cents anyway

I don't have a Virgin account, but I took a look at their help pages. Take a look at:
https://www.virginmedia.com/help/broadband/manage-email-account
Under "How to setup emails on a device" you'll see their recommended settings for IMAP and SMTP. Assuming the information on that page is current (it's not dated), they don't look like they support Oauth for email. They're just using 'app passwords', like microsoft was for a time.

From what I've seen you write here I think you understand, but just to be clear: the 'app password' they generate for you is to be used only with your standalone email client (Tbird, etc.), NOT when you login to Virgin or their webmail website directly - for that you use your 'regular' Virgin password.

Review the server settings they recommend, and check to see if you are using those - correct any differences.
Note that where they say "SSL encryption", the TBird setting would be "SSL/TLS". Similarly where they say Authentication: Password, the TBird equivalent is "Normal Password"

You can see this info in a table in TBird. Look at the "Mail and News Accounts" table under Help/Troubleshooting Information. Click "Include account names" at the top of the page to make the table slightly easier to understand if you have multiple email accounts. You can't directly edit any information there, but if you spot something fishy, you can go back to account settings and try to fix it.

You say TBird sort of works, but keeps nagging you for a new password. I had a similar issue with my outlook account, and I THINK the problem was that TBIRD somehow had two sets of settings for password and/or protocol for that account (ie one for normal password AND one for Oauth with IMAP and/or SMTP), and maybe was trying to use them both, and getting messed up. I seemed to be OK with just dismissing the new password prompt (not giving it a new one), but as you've said, its pretty annoying.

Take a look at your saved password list. Sort it by username (click on the username header), and make sure you only have 2 Provider lines for each username. One for imap, and one for smtp. If you've got more than that, even if all the passwords look right, get rid of the extras. If you do delete anything, it might be a good idea to exit and restart TBird before going any further to make sure the changes are saved and used.

For me, I think I cleared up my issue with Outlook email by removing the account from TBird and starting over, but hopefully cleaning up the entries would be enough.

Well, I think that's about all the help I can provide. Since I don't have a Virgin account myself, I can't offer any firsthand experience with their specific issues or test things myself. Good Luck!

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Sun, 25 Feb 2024 18:03:26 GMT

Thanks for your detailed and thoughtful reply, Richk.

I am at my wits’ end with this. All my account settings are as specified by VM, including the app password. A few days ago, the account seemed to have stabilised, and (after it had made a lot of IMAP password requests and me doing “retry” and re-entering password many times) it did eventually accept the password again and was saving sent mails in the “Sent” folder. I rebooted the computer several times during the days to make sure that it was holding, and it seemed OK. That night I allowed the computer to sleep rather than completely shutting down, and the account continued to work all of the following day (yesterday). I thought I’d finally cracked it!

But, after shutting computer down overnight last night, I rebooted this morning, and the old problem was back – repeatedly requesting passwords, although most of that time it was continuing to show received emails (but not saving sent emails to “Sent”).

This all seems so random… I have just deleted the account and generated a brand new app password (and yes, I did remove the old password from the Thunderbird “saved passwords”). I’ve now re-added the account to Th/brd with its new password, and it’s working OK again. I’m waiting to see what happens next and if it lasts, but if anyone can offer enlightenment as to what’s going on it would be welcome. I have the account on two separate computers, and same symptoms on both. With separate Windows and Thunderbird installations, that makes me think it must be a problem with the account itself at VM's end. Where can I get help to resolve this?

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Sun, 25 Feb 2024 20:55:45 GMT

Four hours after putting in the new password and getting account working, the fault has reappeared - continual rejection of app password and no longer saving sent mails in "Sent" folder.

Re: Mozilla Thunderbird issues with Outlook Accounts

richk — Sun, 25 Feb 2024 23:16:10 GMT

OK, so maybe you could try enabling logging of SMTP and hope that something in the logs gives a hint as to what's going wrong. But I wouldn't be too optimistic.

You'll want to set the "mailnews.smtp.loglevel" to "All" (case sensitive) in the config editor.
(more info about working with the config editor: https://support.mozilla.org/en-US/kb/config-editor)

To access the Config Editor:
Click ≡ > Settings > General
Scroll down to the bottom and click [Config Editor]

Then in the search box type: mailnews.smtp.loglevel
click the pencil on the right to edit, then type in: All, and hit enter.
(later when you want to undo this, come back to this same spot and hit the left leaning arrow instead of the pencil to reset the value.)

Then do a ctrl-shift-j to bring up the Error Console. Make sure the [Debug] button near the top of the window is selected. You can probably un-select the rest of them. You might also want to click the gear icon and enable "show timestamps"

Now send a test email from the problem email account to one of your other email accounts (so you dont have to bother anyone else with your debugging)

Take a look at the Error console and see what it says. Maybe there will be something there that points out whats wrong and gives you an idea about how to fix it. But more realistically, it'll probably just say something like "authentication failure" which isn't too helpful.

I'd suggest comparing what you see in the logs for failures and successes in sending emails so you can possibly isolate whats different when there's a failure. For success examples ideally you'd look at the logs using this account when its working. Otherwise, you could compare to logs of successful sends using other email accounts that are always working, but be aware that your other accounts might be using different authentication methods or have different quirks.

A hint about reading the logs. Some lines begin with a C: or S: Those stand for Client and Server respectively. Client being your machine, and Server being the Mailserver you're trying to talk to.

Unfortunately the logs 'suppress' authentication details, which I presume means passwords, so you wont be able to see exactly which password its trying to use. There may be some way to disable the suppression, but I haven't found it.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Mon, 26 Feb 2024 00:14:16 GMT

Since my last post the account has started working again -both accepting password and saving to send - though I'd done nothing to it. When it started working again on main computer, the other one also updated without being touched. Then an hour later got an IMAP log-in failure message on screen, and the other computer also had this. However emails were still being sent and received, but not shown in "Sent".

Thanks for your logging suggestions, but I'm no techy and wouldn't understand the reports even if I managed to get them. I have the feeling that I should be hounding VM to sort out this random-behaviour mess, since they should have the techniques and know-how. Mind you, getting any response from them will probably take a week!

I'm very grateful for your comments.

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Mon, 26 Feb 2024 10:02:01 GMT

Happy to help and I hope your problem gets fixed in the future.

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Mon, 26 Feb 2024 11:47:51 GMT

Hello

About mailnews.smtp.loglevel
For illustration purposes take a look screenshots
https://forums.mozfr.org/viewtopic.php?p=945712#p945712

Otherwise, and for my part, i don't use two-step verification, app password.

IMAP checked e-mail received ok sent ok
outlook.office365.com 993 SSL/TLS Mot de passe normal
outlook.office365.com 587 STARTTLS Mot de passe normal

POP checked e-mail received ok sent ok
outlook.office365.com 995 SSL/TLS Mot de passe normal
outlook.office365.com 587 STARTTLS Mot de passe normal

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Wed, 13 Mar 2024 00:50:33 GMT

Well, some time has passed and I'm still having exactly the same problem. Virgin Media put me in touch with their Gadget Rescue people, and they "took over" my computer and tried reinstalling the accounts with new app passwords, and then completely reinstalling Thunderbird completely. If anything, this has made things even worse. Admittedly, their operative was almost impossible to understand through thickly accented English (not his fault, they just have the wrong people doing these jobs). Since I'm having the same problem on two separate computers (so two Thbrd installations and two Windows installations), I'm wondering just where the root of the problem is - is it Virgin Media or is it Thunderbird. Meanwhile, my Android mobile seems to be working OK with the same account settings. Today, one of the accounts hadn't received any of today's received emails (all showing on my Android) when I booted computer at mid-day - in fact latest emails shown were from day before yesterday. The account was still sending emails. Then, in the early evening all of the missing emails suddenly arrived without any action from me. All of the time I'm getting the message "Log-in to server imap.virignmedia.com with username xxxxxx@blueyonder.co.uk failed" even when it is successfuly sending messages (but not saving in the "Sent" folder.

Could this be a corrupted Thunderbird profile problem? If so, why is it happening on two computers?

I'm at my wit's end with all this - four weeks now, and I'm still not sure whether it's a VM or a Thunderbird problem, or why my Android isn't affected.

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Wed, 13 Mar 2024 06:12:18 GMT

One question, did the Gadget Rescue people "take over" both of your computers or just one?

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Wed, 13 Mar 2024 11:05:39 GMT

No, they only took-over my normal/main computer. The other one is kept as a backup for desperate times like these. The other one was, however running at the time and connected to router's wi-fi.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Wed, 13 Mar 2024 12:15:51 GMT

Out of interest, I found this curl command line procedure from a google search. I don't know whether it's of any meaning or relevance to the problem -

"C:\Users\xxxxx>curl -v smtps://smtp.virginmedia.com -u xxxxxxx@blueyonder.co.uk:[xxxx.xxxx.xxxx.xxxx]

* Trying 84.116.6.19:465...

* Connected to smtp.virginmedia.com (84.116.6.19) port 465

* schannel: disabled automatic use of client certificate

* schannel: next InitializeSecurityContext failed: Unknown error (0x80092012) - The revocation function was unable to check revocation for the certificate.

* Closing connection

* schannel: shutting down SSL/TLS connection with smtp.virginmedia.com port 465

curl: (35) schannel: next InitializeSecurityContext failed: Unknown error (0x80092012) - The revocation function was unable to check revocation for the certificate."

[The x's have been substituted for name and password]

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Wed, 13 Mar 2024 15:50:01 GMT

I'm no expert but yeah it seems there's a lot going on there.

Ok, try this, change authentication to "normal password" let's see if that stops the security check from tripping.

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Wed, 13 Mar 2024 16:05:44 GMT

The accounts are already using "Normal password" - there isn't an OAuth2 option listed for them. Also, although that command-line output speaks of SSL/TLS on port 465, the smtp server is actually set for STARTTLS on 587. But I don't know how the Curl command works, so that may not be relevant to anything. I'm not sure anyone understands what's going on here - I certainly don't.

This morning when I booted the accounts weren't showing any of my test emails after midnight-ish last night (although todays were showing on my phone). Then about 2.30pm, emails arrived, and the accounts were sending and receiving normally again. For how long, I'll have to wait and see.

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Wed, 13 Mar 2024 19:30:58 GMT

Then why not set the authorizing option to SSL/TLS?

Re: Mozilla Thunderbird issues with Outlook Accounts

Boulevardier — Wed, 13 Mar 2024 20:44:00 GMT

Authorisation was set to SSL/TLS until a few days ago; when Gadget Rescue took over they changed it to STARTTLS, and when I queried it with them assured me that STARTTLS was what the automatic setup was advising, and so leave it at that (I'm far from convinced that they know what they're talking about). I have tried going back to SSL/TLS today, and it makes no difference to the problem.

Something I'm not sure about is whether VM server takes some time to register and implement such changes.

Thanks for your help and suggestions, Mizar.

Re: Mozilla Thunderbird issues with Outlook Accounts

Mizar — Fri, 15 Mar 2024 14:42:16 GMT

I just wish I could've done more, hope you'll find a solution.

Re: Mozilla Thunderbird issues with Outlook Accounts

cardloser — Sun, 09 Jun 2024 17:14:52 GMT

This issue seems to have been resolved in Betterbird. Check this out: https://www.betterbird.eu/

Re: Mozilla Thunderbird issues with Outlook Accounts

WanderingTravel — Wed, 19 Jun 2024 14:07:06 GMT

Having the SAME issues again. Just going to try betterbird, this is absolutely ridiculous.

Re: Mozilla Thunderbird issues with Outlook Accounts

nonamen — Fri, 05 Jul 2024 12:27:58 GMT

I was blocked untill I removed the other outgoing server as you mentioned.

Thx!

Re: Mozilla Thunderbird issues with Outlook Accounts

stephenc — Fri, 05 Jul 2024 12:53:44 GMT

I had a scarey email from Microsoft saying they were making OAuth2 Compulsory from September this year.

No OAuth2, no email!

I wonder why, as I am already set up with it, so why send me a scary email???

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Fri, 05 Jul 2024 14:32:00 GMT

Hello

@stephenc wrote:
I had a scarey email from Microsoft saying they were making OAuth2 Compulsory from September this year.
No OAuth2, no email!
I wonder why, as I am already set up with it, so why send me a scary email???

In addtion, take a look at
https://connect.mozilla.org/t5/discussions/recent-microsoft-announcement-about-using-outlook-or-lose/td-p/61385
https://forums.mozillazine.org/viewtopic.php?t=3122841

Re: Mozilla Thunderbird issues with Outlook Accounts

JimboTheThird — Fri, 12 Jul 2024 10:33:19 GMT

Just received the same Ransomware email from Microsoft - the 'bug' bemoaned in the above enormous thread - which I suffer from today - is clearly intentional by MS to force ppl to use Outlook and be sucked into their ecosystem - exactly why I use TB in the first place, first to keep work and life separate and basically to avoid the MS venal idiocy of 'saas'.

For sure I'm now faced with the arduous task of migrating many accounts linked to Outlook (live, hotmail or whatever new name MS come up with). But so fed up with MS, gonna do it eventually.

BUT IF TB DON'T GET A GRIP ON THIS, MANY PEOPLE WILL DRIFT AWAY IN SEARCH OF AN EMAIL CLIENT THAT WORKS.

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Fri, 12 Jul 2024 12:09:59 GMT

Hello

Allow me to ask a question

Update your sign-in technology before September 16th, 2024 to maintain email access.
What is the relationship with Thunderbird?

Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps
https://support.microsoft.com/en-us/office/modern-authentication-methods-now-needed-to-continue-syncing-outlook-email-in-non-microsoft-email-apps-c5d65390-9676-4763-b41f-d7986499a90d

But, apparently Microsoft OAuth2 does not work with Thunderbird 91 and 102.
By way of illustration https://forums.mozillazine.org/viewtopic.php?p=14980346#p14980346

Re: Mozilla Thunderbird issues with Outlook Accounts

GeeMac — Fri, 19 Jul 2024 18:02:23 GMT

re ya go MS wants everyone to buy Outlook or lose your emails. I followed the stems and it al lmade things worse. They aslo made the pictures hard to read so you throw your hands up and say Okay.. I'll pay $300 a year for their garbage. https://support.microsoft.com/en-us/office/modern-authentication-methods-now-needed-to-continue-syncing-outlook-email-in-non-microsoft-email-apps-c5d65390-9676-4763-b41f-d7986499a90d

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Sat, 20 Jul 2024 05:13:43 GMT

Hello

As far as I'm concerned, it's already done.

Re: Mozilla Thunderbird issues with Outlook Accounts

noNeedFORgps — Mon, 12 Aug 2024 11:24:58 GMT

So the first few times I switched to "OAuth2" ([both in "Outgoing Server (SMTP)" and in "Server Settings --> Edit SMTP server..."]) it still gave me the same problem by continuing to ask for my outlook-dot-com password, while still working regardless but also lagging the crap out of Thunderbird.

I looked around at a lot of threads out there, and finally found the email sent by Microsoft (the article from Microsoft said this email was sent on the 11th.... I seemed to receive it at 1:32AM on the 28th of June 🙄) that has a recently added link directly containing directions about setting up Thunderbird: https://support.microsoft.com/en-us/office/modern-authentication-methods-now-needed-to-continue-syncing-outlook-email-in-non-microsoft-email-apps-c5d65390-9676-4763-b41f-d7986499a90d

Oddly enough as soon as I read that article, and setup OAuth2 again-again-once again.... restarting Outlook finally opened up to this classic Windows account login page you should find familiar. I'm assuming this AuthO setting simply takes a little bit of time to register with Microsoft? It didn't work the first few times, and I couldn't explain why! But this is the "modern login requirement" concept that Microsoft is soon to mandate to use any third-party app:

(These pics are hosted on my domain, they're safe!)

Again you want these to show up after starting Thunderbird, by THUNDERBIRD'S own actions automatically. Afterwards you'll see Thunderbird show up within your Microsoft Account Dashboard under "Privacy > App Access" or (because Microsoft loves making multiple avenues that do the same thing 🙄🤯), another Microsoft account page with the heading "Apps and services you've given access". They'll also email you after properly setting it up with a subject: "New app(s) connected to your Microsoft account".

I hope this helps! Eventually it worked for me, all you have to do is switch over to the OAuth2 and find apparently. Good luck.

Re: Mozilla Thunderbird issues with Outlook Accounts

chris451_hotmai — Wed, 14 Aug 2024 16:08:26 GMT

Thunderbird outgoing server for outlook was added.

outlook

smtp-mail.outlook.com

port 587

conn security starttls

auth method kerberos/gssapi because there is no choice for oath2 i the security and authentication
I have a token stored and Imap works.
I can write a message in imap outlook email and save it as a draft
I can go to web based outlook and its logged in from the token
I can send the draft from there, but thunderbird can't send it directly<
connection seems to fail.
Checed firewall there was an instance of thunderbird.exe that I added internet access to.
I cant set it correctly because in smtp server there is no 'oath2' choice in authentication method.
versioin 128.0.1esr 64bit. 'nebula'.

Messages are received via imap.
Drafts are synced to outlook.
Sending on outlook is enabled I think.
Receiving via thunderbird is enabled on outlook and messages come in fine
thunderbird can send messages via gmail.com
Thunderbird can't send messages from working smtp servers if the from does not match the account.

Re: Mozilla Thunderbird issues with Outlook Accounts

Agentvirtuel — Wed, 14 Aug 2024 16:36:46 GMT

Hello

Enter the correct server names, then restart TB and change to OAuth2 ?
(e.g.) https://support.mozilla.org/en-US/questions/1417298#answer-1588949

Re: Mozilla Thunderbird issues with Outlook Accounts

Grigoris — Wed, 21 Aug 2024 16:33:06 GMT

Same here with latest version 115.14.0 64bit

This is make thunderbird really hard to work with.

Really to hard.

I think to change to another multimail program.

Does anyone find a solution to this?

I even try to total uninstall(Even registry values) and re-install from start the thunderbird all my mail accounts with oauth2 but still at hotmail/outlook mail accounts always asking me passwords or failed to verify.

But at other mails like gmail or yahoo work fine.

Re: Mozilla Thunderbird issues with Outlook Accounts

TAGarrison — Wed, 02 Oct 2024 15:24:35 GMT

I don't know how well this will be received, but through this entire thread I did not see anything about using POP3 as opposed to IMAP.

There is nothing IMAP does that you cannot get with POP3. I've been using POP3 (and previous versions) since the early 90's. I hate IMAP.
I'm also a Web developer. I set up clients with POP3 and, with some simple tricks, get people using POP3 "like" IMAP and they are very happy.

I have a MS account and have for many years. Today, after a couple of "hiccups" the last couple of days with Outlook it's throw the errors. I didn't change anything except the OAuth2. I knew my credentials were correct.
After that simple change everything is working 100%.

At least "consider" using POP3. You can still set up any POP3 account to allow multiple devices to check the same account.

Using a POP3 allows you to keep the mail off the server if you set it up correctly. Every "X" days / weeks (your choice), you use 1 device to download the mail using a POP3 account that does not leave the mail on the server. All other devices leave the mail on the server.

I use 18 completely different E-mail accounts and only use Thunderbird which I just updated to 115.15 and checked everything. All is well and no errors. I can "send" mail through any of the accounts I have. But I usually send through the account to which the message was sent.
If Outlook throws a fit about me "sending" through Outlook, I'll set the account to use a different outgoing account.

E-mail has always been the most complicated service since computers were available for the general public. And it's not any easier today than it was in 1992.
It's simple for me because I've been using E-mail since then. I'm a developer so I stay up on "how to" with E-mail when settings need to change.

Thunderbird is NOT the problem! And the suggestion to use that T-Bird alternative is a really bad idea. Regardless of your situation, there IS a fix for your E-mail. It's not you and it's not T-Bird. Companies like Microsoft will make changes and only tell people about the change through some obscure post...in "their" system. So you won't see it if you search or never log in to Outlook.com

I use Gmail, Outlook and several different domains that are using hosted E-mail servers. I have 1 program that checks every one of the accounts on ever server. After I check mail with that program I download the mail I want with Thunderbird. So if anybody is going to come up against a problem, it would be me.

Just a suggestion to everybody. POP3 is free. IMAP can be costly if you deal with a lot of E-mail daily. IMAP is only free until you haven't cleared out the server in a while and you go over your limit.

Re: Mozilla Thunderbird issues with Outlook Accounts

iatttmp — Sat, 05 Oct 2024 20:56:15 GMT

I also had to update the imap and smtp server names. The Microsoft support page (here) shows Thunderbird dialogs in order to highlight the authentication method. And there they were, the correct server names, small and fuzzy: "outlook.office365.com" for pop and imap, and "smtp.office365.com" for the send server. I was stumped until I saw that. I could have seen mention of server names elsewhere in this thread, but it's a lot of reading while you're sweating about your email gone bad. Cheers.

Re: Mozilla Thunderbird issues with Outlook Accounts

33NHL — Fri, 18 Oct 2024 13:01:10 GMT

Very simple solution.

I got mad as I was playing around with settings incoming outgoing was waste of time.

I have 3 hot mail and outlook accounts.

Just go into Tools

Click on it

Then account settings

Then just delete 1 by one account.

Then re add the accounts

By simply

user name

email used

Password

Click done and all correct settings will be done and all emails are back nothing is lost.

Heck took me less then 5 munites to go thus route then to waste time changing settings on each account and then having to check if it's working or not and going back to change settings again.

So simple delete account/s then re add them.

Re: Mozilla Thunderbird issues with Outlook Accounts

Grigoris — Fri, 18 Oct 2024 19:46:49 GMT

This is the first thing i try before i create this topic.
And still the issue remains.

Re: Mozilla Thunderbird issues with Outlook Accounts

TAGarrison — Fri, 18 Oct 2024 20:55:40 GMT

Something not mentioned, so I don't know if you have included this or not, is OAuth2 which "must" be enabled in TBird or you won't connect to the microsoft server.

Tools > Account Settings > Security Settings (on the right) > Authentication Method
If you have your Server Name, Port, and User Name all correct, then everything should work fine.

Re: Mozilla Thunderbird issues with Outlook Accounts

BugReporter — Sun, 20 Oct 2024 20:06:22 GMT

This is clearly a problem with Thunderbird. I also use other programs (not Micro$oft) in which the authentication method had to be updated to OAuth2 and there is no problem with Outlook accounts. The problem is only in Thunderbird and it relates to when you need to log in to your Outlook account via a pop-up window. If for some reason the server gets overloaded, which often happens with Micro$oft (with the “Too Many Requests” message), this Thunderbird pop-up has no “refresh” option. You can only close it, and this probably causes it to incorrectly save “some credentials” and, as a result, prevents authentication when sending messages with the SMTP server, and this cannot be corrected because Thunderbird has already saved the wrong session in cookies. A similar “Too Many Requests” message is sometimes displayed in the web browser when logging into Outlook mail via the web browser, but just press F5, confirm resend and it works. In Thunderbird, in the window with the “Too Many Requests” message, F5 does not work.