Hi,
I dont know, whether the HELO/EHLO from the MTA-Client means anything and
whether it can be used for a reverse DNS lookup.
However, it makes sense to do DNS lookup für the MAIL FROM: address.
This is alrady feasable by some qmail patches, including my SPAMCONTROL.
Have a look at:
http://www.fehcom.de/qmail_en.html
cheers.
eh.
At 01:29 7.3.2001 -0500, Peter Cavender wrote:
>> At 10:07 AM 06-03-2001 -0000, John Conover wrote:
>> >As a matter of policy, is it reasonable to reject messages that fail a
>> >reverse DNS lookup on HELO's FQDN/authentication?
>>
>> Well two of our service providers haven't arranged reverse DNS lookups for
>> our Internet visible subnets. Our DNS servers are ready, but they either
>> don't want to do it or don't know how to do it. So you can't look up names
>> from our IPs. And it's been more than a year already.
>>
>> So I'm biased and I'd say it's not reasonable ;).
>>
>> Why would you want to do that anyway?
>
>Spam prevention. Have had the same problem myself. It is indeed sad that
>we have to jump through these hoops because a few folks insisting on
>emailing everyone about their inkjet refills or lower mortgage rates
>necessitate this.
>
>> Cheerio,
>> Link.
>
>
>
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