Hi I am in the process of setting up a split MX system, if that's what it is generally called. Basically, the idea is to have a dedicated smtp gateway for accepting mail into the mail system that cames from other MTAs and have outgoing mail from authenticated users go out from a different machine - let's call it smtp/mail server.
The way I've set it up is that the smtp-gateway has a list of all domains that are hosted on the smtp/mail server and forwards mail to the relayhost (mail/smtp). The problem I have run into is recipient verification on the smtp gateway. The valid recipients come from a variety of places, so for the moment I'm using recipient verification. But I'm wondering if there is a better solution. Something that allows me to query the mail/smtp machine for valid recipient addresses. Both machines run postfix (Debian etch). Any help much appreciated mimo
