On Wed, Jun 18, 2014 at 2:30 AM, Joey J <jacklistm...@gmail.com> wrote: > We have 2 gateway servers in multiple locations so that we have redundancy > and of course corresponding mx records pointing to both. > This handles if GW1 fails, go to GW2 > > Now once at a GW the transport map handles the routing of the messages for > domain.com as shown: > domain.com smtp:[1.2.3.4] > > However, lets say that server is at a location/building which has 2 internet > connections, (primary) using 1.2.3.4 and (secondary) using 8.9.10.11 > and the primary connection fails. > > My servers will queue the mail since it can't communicate with 1.2.3.4. > > What I would like to do is have our server try to deliver to 1.2.3.4 but if > that fails try to deliver to 8.9.10.11 much in the same way as MX records > function. > > I'm not seeing a way to accomplish this, any suggestions, or examples? > > If you wanto to deliver do 1.2.3.4 and , if fails, then try 8.9.10.11 then you can create a dns entry with those IP an MX
ex: some_entry.local IN MX 10 1.2.3.4 some_entry.local IN MX 20 8.9.10.11 then setup transport_maps to: domain.com smtp:some_entry.local Hope it helps. other method is using smtp_fallback_relay José Borges Ferreira
