Prevent loss of emails due to Amavis removal

[stijneikelboom]

Is your feature request related to a problem? Please describe.
The Plesk Email Security extension uses Amavis as a content filter behind Postfix. The conversion process removes Amavis, but leaves the Postfix config as is. When the server comes back online, routing mails to Amavis fails, leading to the unrecoverable loss of messages.

Describe the solution you'd like
During conversion, either:

• Remove or comment the line content_filter = smtp-amavis:[127.0.0.1]:10024 in /etc/postfix/main.cf, if present.
• Reinstall and enable Amavis when Plesk Email Security is installed on the server.

Describe alternatives you've considered
Manually reinstall Amavis or the entire Plesk Email Security extension directly after the conversion.