Mail unexpectedly quits when I type certain addresses

vitor-twenty12 wrote:

SafeBoot everything's the same.

Guest account everything ok! - Seems to be an isolated, user-related, issue.

When i type something into the address filed, on mail app, it starts suggesting email address and names of previously sent emails - might that be the issue? Can i "clear cache" on that?...

Yes you can clear previous recipients from Mail>Window>Previous Recipients

Further you can get a good look at your System config. for conflicts or issues, you can run this trusted utility http://etrecheck.com  

If you need help interpreting the report you can post it here in its entirety in the "Additional Text" box in the editing toolbar below, in your reply.

You can set its preference to "Allow full Disk Access",  with this you get a digest of issues from the last 7 days that are saved in your system.

Never heard this before.

To trouble shoot further you can:

Try a SafeBoot https://support.apple.com/en-us/HT201262

Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login and test. Reboot and test will take a little longer as caches get rebuilt.

This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.

Test issue in another user (or guest user) account  https://support.apple.com/en-us/HT204443

This will tell you if it a universal issue or isolated to your user/admin account. 

vitor-twenty12 wrote:

Clearing Mail>Window>Previous Recipients solved it.

Thank you very much!

Good computing vitor-twenty12 !