Cameron Camp a écrit : > If I have a box with a valid reverse DNS entry of mail.example.com that > has virtual domains of > > domain.com > otherdomain.com > somedomain.com > > will my "wrong" reverse DNS for the virtual domains affect delivery? Do > I need to do anything? >
many people confuse "virtual hosting" (web, ftp, ...) which means having many names that resolve to the same IP, with reverse DNS "coherence" which means: if I resolve the IP, say 192.0.2.1, I get a name, say foo.example.com If I resolve foo.example.com, I should get the "original" IP, that is 192.0.2.1. here is an example of a "correct" config: == PTR 192.0.2.1 => joe.example.com == A joe.example.com => 192.0.2.1 titi.example.com => 192.0.2.1 tata.example.com => 192.0.2.1 tutu.example.com => 192.0.2.1 fifi.example.com => 192.0.2.1 as you can see, the IP has a SINGLE PTR, but many names resolve to the IP (thus allowing "virtual hosting"). I yet to see any reason why one would want multiple PTRs for an IP.
