I have 2 new boxes running Centos8 and Plesk Obsidian Version 18.0.28. The box uses Postfix and we have not installed Plesk Email Security.
A couple of days ago email stopped being delivered and both boxes and was found in the queue. After trying to flush the queue and running the basic config checks on the mail server I managed to narrow the issue down to the main configuration file for Postfix /etc/postfix/main.cf
It had the following line in it.
content_filter =...
Postfix configuration keeps reverting to smtp-amavis content filter when Plesk Email Secruity is not installed
A couple of days ago email stopped being delivered and both boxes and was found in the queue. After trying to flush the queue and running the basic config checks on the mail server I managed to narrow the issue down to the main configuration file for Postfix /etc/postfix/main.cf
It had the following line in it.
content_filter =...
Postfix configuration keeps reverting to smtp-amavis content filter when Plesk Email Secruity is not installed