[ top-posting fixed, please do not do that ] On Tue, Mar 01, 2011 at 04:12:13PM +0100, Matteo Cazzador wrote: > Il 01/03/2011 16:06, Ralf Hildebrandt ha scritto: > >$ host 212.91.92.247 > >247.92.91.212.in-addr.arpa domain name pointer host-247-92.91-212.enter.it. > > > >mail.brunosrl.net != host-247-92.91-212.enter.it > > > >thus it's considered "Unknown". Solution: Make sure 212.91.92.247 > >resolves to mail.brunosrl.net instead of host-247-92.91-212.enter.it
> Ok thank's but if my server will be a virtual mail server? > with same ip to serve different domain? > in this case how is possible to realize correct host IP? http://en.wikipedia.org/wiki/Forward_Confirmed_reverse_DNS Any IP should only resolve to one name. Pick one name that you want your server to have. Set that as its reverse DNS (PTR) name. If you want to serve different domains and have each one on unique hostnames, set up different instances on different IP addresses, where each IP address has FCrDNS as desired. That's ridiculous and unnecessary, but for some reason also a very popular idea. -- Offlist mail to this address is discarded unless "/dev/rob0" or "not-spam" is in Subject: header
