Last month, our e-mail exchange (Postfix) started having trouble delivering mail to certain destinations. These destinations all appeared to be using Microsoft Office 365 for their e-mail. What was wrong? Who was to blame? And how to fix it?
powerdns patch xenial recursor ubuntu
At times, Dovecot started spewing messages into dovecot.log about a corrupted index cache file because of “Broken MIME parts”. This happened on Ubuntu/Xenial with dovecot_2.2.22-1ubuntu2.2:
patch xenial dovecot ubuntu