How to remove addresses from Thunderbird's autocomplete drop-down?
Solution 1:
Try this:
- Open the Address Book.
- Select Collected Addresses.
- Select the entries to delete.
- Type Del to delete the entries.
Ensure no explicit entries for the obsolete email address exist in Personal Address Book.
Solution 2:
You can find your answer here
This one is about as counter-intuitive as it gets. The trick is that you don't delete auto-complete entries from the main Thunderbird window -- you delete them from the autocomplete cache as accessible from within a new email.
- Turn auto-completion on
- Open a new email
- Within the email window, click the Contacts button (should create a pane at the left with the list of addresses)
- Delete the entry you don't want.
I've done this successfully on my machine.