MailCow Postfix regex catch mail redirect

README.md

This will allow you to match incoming mail by regex and redirect it to any other mail but will break the Catch-ALL rule in the Aliases.

(Assume that you are root and repo was cloned into the /root/mailcow-dockerized)

Override main.cf

nano /root/mailcow-dockerized/data/conf/postfix/extra.cf

Add new line

virtual_alias_maps = regexp:/opt/postfix/conf/aliases-regexp

Add regex rules

nano /root/mailcow-dockerized/data/conf/postfix/aliases-regexp

/^prefix1(.*)@mydomain.com$/    catch@mydomain.com
/^prefix2(.*)@mydomain.com$/  catch@mydomain.com

Restart the postfix container