Mail.app: Clear Address Auto-Fill Cache
How do I clear the auto-fill address field cache in Mac Mail? I have loads of old addresses that I do not send email to.
A removal and reinstallation of the email accounts does not affect the cache.
Solution 1:
See the menu Window -> Previous Recipients - you can select all and delete or be more selective.
Once that's done you may also want to prune your address book or disable mail from auto-filling from there as desired.