>If it originally went to domain.com and postfix-01.domain.com is priority >10 for that domain, when my script goes to mail them their false-positive, >it just gets caught again.
The DNS MX record is used by SMTP client to route mail to IMGate. Once the mail is in IMGate, postfix SMTP client (after any re-writing) then resolves next-hop for the recipient domain by: $mydestination transport.map relayhost hosts DNS (well, that's how I think the sequence is. :) ) Your problem seems to be that postfix is resolving domain.com in DNS, so "best MX for domain.com is local". So put domain.com in transport.map. Len
