I just wanted to say thank you and well done. I received an email stating Comcast is going to be using Yahoo servers for email, calendar, contacts. So, off I went to change the account settings, in Thunderbird I simply changed the IMAP and SMTP addresses and switched to Auth2. Bingo bango all done. I use eM Client on a second PC and attempted the same modification. No go. I had to delete the account and readd it but using the Yahoo server selection (baked in to the client and now counterintuitive) it didn't take me long of course, but it made the ease at which Thunderbird handle it appreciate it more.
