Hi,
Since the 6 of july, i've stop receiving my emails on several of my accounts. It has gone unnoticed until today because sometimes life just wont let you...
Before reading about the certificates here, i was pulling my hairs trying to solve this problem.
But on my case, the thing to delete was on the Autorities tab and was called "avast! Mail Scanner Root".
But since i've been running several version of both avast and Thunderbird, I've deleted all certificates that weren't "builtin". There was a lot...
Anyways, thanks a lot.