Backup Mail Relay + Spamfilter
I have two Debian Lenny Servers in an ISPConfig 3 multi server setup. I configured server2 to act as a mail backup for server1 using the mail routing feature of ISPConfig 3. The basic setup works fine.
I can also see that mails delivered to server2 are virus scanned on server 2.
Since many spammers seem to prefer a backup (higher DNS MX level) server to deliver their mail I wanted to configure server2 to apply the spam filter before relaying the mail to server1. I tried to add a Spammfilter-User for all users of the routed domain but unfortunatley this was not possible as it seems the Email Pattern needs to be unique across all servers (Error: Duplicate entry '@domain.tld' for key 2), but @domain.tld is already configured as a Spamfilter-User pattern on server1.
Is this a bug or is this configuration just not possible?
Last edited by marinus; 9th November 2009 at 22:27.
Reason: Typos, better explaination of issue