Hello everybody, I'm revisiting this issue after a break - about a year - and now I'm trying to get to the bottom of this. I found a thread from five years back (http://bit.ly/bIFigX) that discusses a similar issue, but my situation is somewhat different.
I'm attempting to create a configuration where mail from a set of local domains is delivered through an external relay while all other mail (i.e. anything but the listed domains) would be relayed directly to the receiving remote smtp servers. I would essentially want to make the "relayshost" parameter conditional per specific domain names: defined for some (for external relaying), and blank for some (for direct relaying). It may be that the only way to accomplish this is to run two separate Postfix instances, one configured with relayhost, accepting outbound mail for those domains that should be relayed via a remote host, and the other configured without relayhost, accepting outbound mail for all other relayable domains. Before embarking on the multiple instances route, however, I wanted to see if anyone on the list would have a solution that would make this possible with a single Postfix instance. Thanks for any advise & insights on this issue! Ville
