How do I create an app password?
Open Settings > App passwords
Pick the mailbox if you manage several.Create
Give it a name you will recognise, such as “Thunderbird laptop”.Copy it now
The password is shown only once. Store it in a password manager.
Where can I use it?
- IMAP and SMTP apps: see connect other apps.
- The TuskMail API: send it as HTTP Basic credentials together with an API key from Settings > Developers. See the API docs.
How do I revoke one?
Delete it from the same list. Any app using it stops working immediately. Create one app password per app so you can revoke them separately.