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Re: dns problem with mailing list server

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Dana Hudes <dhudes(at)hudes(dot)org>
Cc: PostgreSQL www <pgsql-www(at)postgresql(dot)org>
Subject: Re: dns problem with mailing list server
Date: 2004-07-20 14:51:13
Message-ID: 200407201451.i6KEpDF22164@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-www
CC to www list.

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Dana Hudes wrote:
> Hi, 
> 
> The mail relay used for the dbdpg-general mailing list, 200.46.204.17,
> does not have consistent reverse DNS entry (it does have a reverse entry).
> 
> Specifically, while gborg.postgresql.org has address 200.46.204.176 the
> reverse entry 176.204.46.200.in-addr.arpa domain name pointer
> svr3.postgresql.org.
> 
> But svr3.postgresql.org. does not have a forward entry.
> 
> This then falls afoul of the anti-spam measures recommended in RFC2055 and
> the procedures recommended at e.g. www.postfix.org (I use the postfix mail
> relay).
> 
> If someone adds a forward entry for svr3.postgresql.org resolving to
> 200.46.204.176 all will be well.
> 
> Until then my, and many other, mail relays will think mailing list traffic
> is from a fraudulent host and reject the mail (albeit with a 450 status,
> indicatitive of a temporary failure;  potentially when the situation is
> corrected the most recent mail will then be delivered).
> 
> Thanks
> 

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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