On 10.11.2011 02:57, 风河 wrote: > I have two server IPs, the A records for them are: > > mail.dnsbed.com. 300 IN A 74.117.233.4 > mail.dnsbed.com. 300 IN A 74.117.232.204 > > The corresponding PTR records are: > > 4.233.117.74.in-addr.arpa. 36466 IN PTR dnsbed.com. > 204.232.117.74.in-addr.arpa. 36453 IN PTR dnsbed.com.
The forward lookup for dnsbed.com returns:; 173.245.61.41 173.245.61.115 The reverse entries for your nameserver don't have to match your mailserver name but they must be consistent, i.e. the reverse must resolve forward to the IP address. mail.dnsbed.com -> 74.117.233.4 -> dnsbed.com -> 74.117.233.4 would be a consistent reverse/forward loop. mail.dnsbed.com -> 74.117.233.4 -> dnsbed.com -> 173.245.61.41 is not Maybe the easiest way would be to change the PTRs of 4.233.117.74.in-addr.arpa. and 204.232.117.74.in-addr.arpa to "mail.dnsbed.com", so you don't have to move the A records of dnsbed.com HTH, Hauke.
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