Yahoo Mail has stopped working in Thunderbird

[feveal]

For about a week now, Yahoo Mail has stopped working in Thunderbird on my PC (Kubuntu 24.04). Now I can only access it from my smartphone using the Gmail app for Android or the Outlook app for Android. I suspect Yahoo has made some changes to its servers that are now preventing it from accepting requests the way Thunderbird does. I get a window with this error: "Edge: Too Many Requests"

Does this happen to anyone else?

Thanks

[feveal · Accepted solution]

Thank you so much, I've got it working now. I've never needed to do this before, and I've had my Yahoo account with Thunderbird for years.

[wsm · Accepted solution]

Yahoo is working again with oauth autentication. 

[feveal · Accepted solution]

I've managed to access my POP account again. The Yahoo login window appeared, prompting me for my password and mobile confirmation. Just to clarify, it didn't work on the first try; I got an error message five times saying "Something went wrong," please try again. But it worked on the sixth try. Thank you so much for fixing it.

[siffemcon]

This is a Yahoo problem.

This is the usual fix:

First, generate an app PW - see https://help.yahoo.com/kb/SLN15241.html.

Then go to TB menu > Settings > Privacy & Security > Passwords:
- click the 'Saved Passwords' button and edit the Yahoo entry to add your new app PW

- if there is no Yahoo entry, it should be created when you next log in successfully

Next, go to TB menu > Account Settings > Server Settings and set the following:
- Server Name: export.imap.mail.yahoo.com
- Port: 993
- Connection Security: SSL/TLS
- Authentication method: Normal password

On the left column, scroll down and click 'Outgoing Server' and edit the Yahoo entry:
- Server Name: smtp.mail.yahoo.com
- Port: 465 or 587
- Connection Security: SSL/TLS
- Authentication method: Normal password

After that's done, click your Inbox. If you need to enter a PW, enter the app PW you just created.

[Agentvirtuel]

Hello

On https://support.mozilla.org/en-US/questions/thunderbird there are many similar topics.

[feveal · Accepted solution]

Thank you so much, I've got it working now. I've never needed to do this before, and I've had my Yahoo account with Thunderbird for years.

[wsm · Accepted solution]

Yahoo is working again with oauth autentication. 

[feveal · Accepted solution]

I've managed to access my POP account again. The Yahoo login window appeared, prompting me for my password and mobile confirmation. Just to clarify, it didn't work on the first try; I got an error message five times saying "Something went wrong," please try again. But it worked on the sixth try. Thank you so much for fixing it.

[feveal · Accepted solution]

I almost forgot, there's no need to ask for the "Application Password"

[jcoles]

This has just happened to me today (25-Feb-2026). I think it might have something to do with updating to version 148: "Yahoo, AT&T, AOL accounts are switched to PKCE, a more secure auth protocol." Does the solution from Nov 2025 apply here? I don't want to blindly follow instructions that might make things even worse. Every access failure locks me out for another 30min.

This is a major change which can cut off a user's access. We should have been warned and detailed instructions should have been provided. Authentication methods are becoming more and more complex. I looked up PKCE, but it might take days to understand the developer-speak, let alone figure out how to apply that to the specific settings of Rogers Yahoo Mail.

[wsm]

Version 148 would be unrelated to the original purpose of this post.

You don't need to know the details of PKCE, the process is still oauth authentication. This requires cookies and javascript to be enabled. 

If those conditions are met, does setting mailnews.oauth.usePrivateBrowser to true help?

Please post a screen shot of what you see "This has just happened to me today" 

[jcoles]

This window pops up. I click Next and enter the only password I know, but the response is "incorrect password". There is a Reset Password option, but I don't want to try that in case it knocks out access on my other devices.

[wsm]

> If those conditions are met, does setting mailnews.oauth.usePrivateBrowser to true help?

Also make sure you are not running a web server or anything listening on web ports - some AV software for example.

And you should be using a password, not a token that was saved in Thunderbird.

[wsm]

The original post/thread was resolved, so if this isn't resolved quickly for you then we really should move this to https://support.mozilla.org/en-US/questions/new/thunderbird.

[wsm]

I now see you posted at https://connect.mozilla.org/t5/discussions/please-explain-how-to-set-up-thunderbird-pkce-authenticat...