Can't receive or send emails anymore? Are you experiencing synchronization errors with your contacts & calendars? Follow the instructions in this guide to delete the problematic accounts and reconfigure them correctly.

Preamble

• Follow these instructions only to delete an email account configured in IMAP (and not in POP3). Learn more

Delete the email address

To do this:

1. Open Thunderbird.
2. Right-click on the email address to delete and select Settings.
3. Go to Account Management.
4. Select Delete the account and click Delete
5. Refer to this other guide to correctly reconfigure the email address

Delete contacts (in CardBook)

Everything is now integrated into Thunderbird, but if you still have an old version (which you must update):

1. Open Thunderbird.
2. From CardBook select the contact profile to delete.
3. Click on the three-line horizontal menu button ☰ at the top left of the interface, then on Address Book, and on Delete Address Book.
4. Confirm by clicking OK.
5. Refer to this other guide to reconfigure synchronization.

Delete the calendar / agenda (in Lightning)

Everything is now integrated into Thunderbird, but if you still have an old version (which you must update):

1. Open Thunderbird.
2. From Lightning select the agenda profile to delete.
3. Right-click on the agenda and select Unsubscribe from the agenda.
4. Confirm by clicking OK.
5. Refer to this other guide to reconfigure synchronization.