[rt-users] RT Emails Being Blocked by Various Providers

[jmoseley at corp.xanadoo.com]

Some mail environments are even more strict and require that the rDNS entry
of the IP address match with the corresponding forward DNS record.

With that said, I think it's reasonable that an owner of a mail server
sending legit email make sure that the IP address of their mail server have
an rDNS entry.


James Moseley




                                                                           
             Atro Tossavainen                                              
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                                       Re: [rt-users] RT Emails Being      
                                       Blocked by Various Providers        
             03/06/2009 07:44                                              
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On Fri, 6 Mar 2009, Jerrad Pierce wrote:


RFC 1912, while informational only, states that all IP addresses should
have corresponding PTR entries (and that all entries should be valid,
which seems really hard to grasp to many ISPs).  It dates from early 1996.
Section 2.1 in RFC 1912 deals with this issue.  The reverse DNS does not
need to be anything fancy, it only needs to exist (and be valid).