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MS changed authorization method and now it require protocol OAuth2. I've changed my account for two layers authorization and tried change Thunderbird configuration due https://support.mozilla.org/en-US/questions/new/thunderbird/form but it not works. I can't connect. I've no problems to connect with Outlook and standard mail app for Win2010 or using BlueMail on android. Ive Thunderbird v. 115.11.0 (32)

Can You help me? I'd prefere to stay with Thunderbird.

Maciej Garnysz

I Menu app icon > Help > More Troubleshooting Information

   Under 'Application Basics' - Profile Folder - click on 'Open Folder' 

This opens a new window showing the contents of your current in use profile name folder.

   Exit Thunderbird now - this is important. 

Look for the following files and delete them.

   cert8.db - obselete file
   cert9.db - currently used file
   key3.db - obselete file
   key4.db - current used file
   logins.json - current used file
   pkcs11.txt (some people report this file missing)
   secmod.db - obselete file
   session.json
   xulstore.json 

See next comment before you start Thunderbird as you need to empty cache files.

Start Thunderbird

Add yahoo and make sure all the settings are correct. Make sure Authentication Method is Oauth and user name is full yahoo email address.

Report on results.

Modified 15 zuwɛn 2022 23:27:52 -0700 by Toad-Hall Toad-Hall Toad-Hall

   Top 10 Contributor

15/6/2022 23:26 Chosen Solution

ADDITIONAL Whilst Thunderbird is closed - after you have deleted the files mentioned previously.

access : C:/Users/ User Account/Appdata/Local/Thunderbird/Profiles/ Please note this is the Appdata 'Local' location which the computer uses as a cache. Be sure you are in the 'Local' and not the 'Roaming' Delete the contents of the 'Profiles' folder.

then start Thunderbird. keep having to reset my secure key password and tried this in "Roaming" instead of "Local" Help!

Witam, Czy jest możliwość zablokowania dostępu do konkretnej skrzynki email? Mam w Thunderberdzie trzy skrzynki mailowe i chcę aby dostęp do jednej z nich był zabezpieczony hasłem. Czy jest to możliwe do zrealizowania jakimś dodatkiem?

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What are the settings for Comcast email in Thunderbird?

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I am using Firefox 130.0, 64 bit, with Duckduckgo search engine and TB 128.0.3. I have six email accounts with my Internet provider CTI. I use the same password to log into CTI. I select: "Enter your password for (account name) on mail.pa.net." I select: "Use Password Manager to remember this password." That one login activated all six of my accounts. Using earlier versions (V28) of TB, I logged into only one account on CTI and all six accounts activated and remained active until I logged out at the end of any session with CTI. Now the passwords must be entered individually for all six accounts and each account times out after a few minutes of inactivity, then I have to relogin for each account. What happened between V28 and V 130 to change that procedure and can I fix it? CTI explains they did not change anything on their end. Thank you, D. Gordon

400. That’s an error.

The server cannot process the request because it is malformed. It should not be retried. That’s all we know.

I keep getting this pop up message when I click on my inbox folder. I have two other email accounts, and they are working. I have compared the settings for the account that is not working, with the accounts that are working, and they are the same. The account that is not working is my main concern. Sure would like to get it working again. Any suggestions? Thank you if you can help!

I have not been able to get Thunderbird to work with my outlook.com email address since MS requires 2FA, for me about 3 days ago. My server configuration is :

W10/32 bit fully patched Thunderbird 128.2.3esr (32 bit) POP Mail Server outlook.office.365.com, port 995 my MS "user name" which is my email xxxx.outlook.com SSl/TLS OAuth2

       In SMTP Server 

outlook.office365.com 465 SSL/TLS OAuth2 xxxx@outlook.com

The error message I get with this config says "Thunderbird could not connect to server outlook.office365.com; the connection was refused".

I DO NOT have an office365 account.

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Help please.

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My deceased husband, the IT guy, has used Thunderbird for years and I have been able to use it everyday until now without having to enter a password. I do need help with this. Thanks Carol Campbell