1) read your logs in both the Postfix and Imail servers, and see what they say.
2)Make sure the following lines are in your /etc/postfix/transport.map: domain_a.org smtp:your.imail.server (or smtp:[your.imail.server.ip]) domain_b.net smtp:your.imail.server (or smtp:[your.imail.server.ip]) (don't forget to 'postmap /etc/postfix/*.map' !!!) 3) Forwarding between domains that are setup locally on your IMail server should never leave the Imail server - MX lookups and/or remote gateway settings aren't even referenced in sending unless it is to route a message not locally found on your Imail server (so mail shouldn't be getting handed back to your IMGate box UNLESS one of the suspect domains isn't setup properly on your Imail server). Your second guess might be happening if domain_b.net isn't setup properly on your Imail box. 4) what happens when you send directly to [EMAIL PROTECTED] from an external source (get a yahoo.com account and use it for testing) -Tony
