Hello, I have reinstalled Windows 11 and now I have the problem that my mail password is supposedly incorrect. I have tried everything, entered the correct passwords from T-Online, changed the passwords, nothing helps. I have also reinstalled Thunderbird, but all to no avail. Could you please help me so that I can use this wonderful program again? Here is my system: i7 6700 K, WIN 11 HOME, GTX 970 graphics card, 500 GB SSD, 16 GB RAM, 1 TB hard disk,

This page seems to suggest you need a separate password for email apps, different from the one used to access the account in webmail:

https://www.telekom.de/hilfe/apps-dienste/e-mail/programme/passwort-verwalten

https://www.telekom.de/hilfe/apps-dienste/e-mail/einstellungen/posteingang-postausgang-server

Hallo, das hat leider nicht funktioniert, ich komme nicht bei Thunderbird rein

Hello, unfortunately that didn't work, I can't get into Thunderbird

When you changed passwords, did you remove the old ones from Saved Passwords in Settings/Privacy & Security, then restart TB and enter the new one at the prompt? Are your settings the same as in the 2nd link above?

Hi, wie kann ich denn die alten Passwörter entfernen? ich komme leider immer noch nicht rein.

Danke Rainer

Hi, how can I remove the old passwords? unfortunately I still can't get in. Danke Rainer

Settings/Privacy & Security, Saved Passwords. After a password is removed, restart TB and enter the new one when prompted and check the box to store it in Saved Passwords.

hi. ich komme immer noch nicht rein

Hallo, ich habe nochmals Thunderbird installiert und bekomme diese Fehlermeldung: Was soll ich tun?

Suggest you post in the forum for German speakers:

https://www.thunderbird-mail.de/startseite/