So, in my request for opinions, pls., some/most/many admins would like
to refuse messages from non-local machines that do not have a valid
RDNS for the HELO FQDN, but feel such a policy is inappropriate from
the user's POV.
I have a lot of users that have a common ~/.procmailrc, (mostly spam,
MS/Outlook frailties, stuff-its an ln -s from my ~/.procmailrc,) and
many of them agreed to participate in letting me put a header record
"Sending-Machine: unknown" in such messages-as opposed to refusing to
process the message.
We'll see how it goes for a month, or so, and see how many messages
would have been refused by such a policy, vs. how many should have
been refused.
Thanks to all for the opinions,
John
Erwin Hoffmann writes:
> Hi,
>
> At 09:49 7.3.2001 +0000, James R Grinter wrote:
> >Erwin Hoffmann <[EMAIL PROTECTED]> writes:
> >> However, it makes sense to do DNS lookup f=FCr the MAIL FROM: address.=20
> >
> >If you have reliable DNS services - I've been on the other end of
> >that, a site permanently rejecting each mail (a 5xx code) because they
> >were having problems resolving the sending domain. Delegation and the
> >nameservers were fine, as it was the second address I tried (which
> >also failed with a 5xx code)
> >
> >Very messy, and not very good for their customers.
> >
> >James.
>
> In particular to cope with this, my implementation lets you define for
> which Domains you dont want DNS Reverse Lookup: /var/qmail/control/nodnscheck.
> SPAMCONTROL does a logging on that, thus you easily can figure out, which
> Domains cause the problem.
>
>
> cheers.
> eh.
>
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--
John Conover Tel. 408.370.2688 [EMAIL PROTECTED]
631 Lamont Ct. Cel. 408.772.7733 http://www.johncon.com/
Campbell, CA 95008 Fax. 408.379.9602
