On Tue, Feb 11, 2014 at 09:48:29AM CET, "Klaffehn, Peter" <[email protected]> said: > > Now the strange thing. There is no mx record for apple.de: > > > > root@mx-50:~# host -t mx apple.de > > apple.de has no MX record > > > > So how could postfix determine the mxer for this Domain? Apparently postfix > uses the a records: > > > > root@mx-50:~# host -t a apple.de > > apple.de has address 17.178.96.17 > > apple.de has address 17.149.160.31 > > apple.de has address 17.172.224.31 > > > > Why? these Feature is off by Default and not activated on my mailserver: > >
That's the standard : if a right hand side of address has no explicit MX record, but a A record in the DNS, then the A record is an implicit MX.
