>Is it possible to have Postfix (acting as a gateway) look-up each user >and then decide which mail server to forward that message to?
yes >All of the users are on the same domain (snip.net) There are probably several ways to do this, but here's one: use recipient_canonical_maps + transport.map I think it would be simpler to have a different map file per Imail box: recipient_canonical_ImailA.map recipient_canonical_ImailB.map recipient_canonical_ImailC.map Each file would re-write per-recipient to different recipient domain : [EMAIL PROTECTED] [EMAIL PROTECTED] Then in transport.map: a.snip.net smtp:[ip.ad.re.sA] b.snip.net smtp:[ip.ad.re.sB] c.snip.net smtp:[ip.ad.re.sC] In each IMail's snip.net domain, add the appropriate domain alias: snip.net a.snip.net So it will accept mail for [EMAIL PROTECTED] I don't guarantee this will work. Guarantees aren't $free. :)) Len
