[Asterisk-Users] Digium list server and spam assassin

[Jason Pyeron]

On Thu, 20 Oct 2005, Andrew Kohlsmith wrote:

> On Thursday 20 October 2005 14:45, Jason Pyeron wrote:
>> it seems to be complaining that lists.digium.com does not match
>> digium-69-16-138-164.phx1.puregig.net
>
>> so either the reverse dns should to be fixed or the hostname used by the
>> machine should be fixed.
>
> Or...  you need to tune SpamAssassin.  IIRC (but I could be wrong), DNS
> servers should have a PTR record, not necessarily reverse matching forward.

In general that is correct.

But the etiquette for SMTP is the HELO is done with a reverse friendly 
name.

This 'assists' in detection of spoofed dns spamming.

EX:

64.4.32.7 connects to mail.pdinc.us and says:

   HELO mail.ibm.com


mail.pdinc.us should mark the message as:

received from mail.ibm.com (hotmail.com [64.4.32.7])

and the user should then know that there is something wrong 
hotmail.com != ibm.com

So no, it is not SpamAssassin which needs tuning in this case, 
lists.digium.com should say

  HELO digium-69-16-138-164.phx1.puregig.net

instead.


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