spamassassin-users October 2010 archive
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spamassassin-users: Re: Whitelist questions

Re: Whitelist questions

From: Alex <mysqlstudent_at_nospam>
Date: Tue Oct 05 2010 - 15:51:57 GMT
To: SA Mailing list <users@spamassassin.apache.org>

Hi,

>> X-Envelope-From: <user@lanyon.com>
>> Received: from S253906HZ1EW06.usstls6-hosting.savvis.net (unknown
>> [209.16.192.170])
>>
>> Is it because there is no reverse DNS entry?
>
> As the documentation [1] clearly states, the second value  (a) is a
> string matched against the relay's rDNS in the Received headers, and
> (b) it is your MX's responsibility to perform the rDNS lookup and add it
> to the header.
>
> The latter is key, because despite "no reverse DNS entry" being
> ambiguous, there actually is an rDNS entry for the IP. In DNS, it's
> merely missing from the Received header.
>
>  $ host 209.16.192.170
>  170.192.16.209.in-addr.arpa domain name pointer Lanyon.com.
>
> So, fix your MX. :)  With an rDNS entry in the header, you will need to

I'm not it's a problem with my system. It's not that IP that has the
problem, but with the host itself:

$ host S253906HZ1EW06.usstls6-hosting.savvis.net
Host S253906HZ1EW06.usstls6-hosting.savvis.net not found: 3(NXDOMAIN)

I suppose I could add that host to /etc/hosts, but is there another
way to whitelist mail from this host/domain to a specific user? There
are also no SPF records to use...

Thanks again,
Alex