On 8/2/2012 2:02 PM, Michael Durket wrote: > I have a host (A) acting as an MX for host (B). Currently I do this via > relay_domains and relay_recipient_maps. Is it possible to do this instead via > virtual_domains and virtual_aliases? Or would a virtual_alias map entry on MX > host A to forward user@B to user@B not work right (because the > right-hand-side user@B would generate an MX lookup for B which would loop > right back to host A)? >
Using relay_domains and relay_recipient_maps on host A is the correct mechanism when host A is the MX for host B. In some cases is it also necessary to add a transport_maps entry so postfix knows where to deliver mail for the relayed domain. If you want to add aliases, you can use virtual_alias_maps (NOT! virtual_alias_domains) on host A without changing relay_domains or relay_recipient_maps. http://www.postfix.org/postconf.5.html#virtual_alias_maps If you need to override the MX for a specific user, use a transport_maps entry. http://www.postfix.org/postconf.5.html#transport_maps -- Noel Jones
