On 6/17/2014 8:30 PM, Joey J 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 <http://domain.com> as shown: > domain.com <http://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? > > > -- > Thanks! > Joey >
Transport maps are intended as static routing to override standard MX records, not as a replacement for MX records. As such, postfix has no support for multiple transport targets nor "weighted" transport tables. Solutions would include localized or split horizon MX records, or use a network routing protocol that will cause the kernel IP stack to select the preferred route. -- Noel Jones
