North American Network Operators Group

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Re: question on ptr rr

  • From: Chris Adams
  • Date: Sun Feb 08 17:02:25 2004

Once upon a time, Andrew - Supernews <[email protected]> said:
> If you're going to get picky about HELO names, then it's better to
> require that the HELO has an A record pointing to the connecting IP,
> rather than look at PTR.

That isn't necessarily a good test; for example, we've got a couple of
servers in a cluster.  One IP pointed at the cluster is,
and that is what is used in HELO/EHLO when making outbound connections,
but the connections don't come from that IP.  They come from the cluster
member's IP so that when we get a complaint with sending IP, we don't
have to look through the logs for the whole cluster to find the
Chris Adams <[email protected]>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.