[Mimedefang] Suggestions on rejecting relays that provide syntactically-invalid arguments to HELO/EHLO

[Mark Suter]

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m => Michael Sims
k => Kenneth Porter

m> I'm also trying to decide what error I want to give people.  I
m> should probably give an error such as "Invalid argument passed
m> to HELO" or even "HELO requires fully qualified domain name or
m> address literal", but I hesitate to tell the spammers how to
m> fix their spamware to bypass this.

k> Perhaps something cryptic like "Peer not RFC-compliant"?

Please provide necessary detail for an innocent administrator to
fix their misconfiguration.  If you want to make it harder for
the spammers, try referring to a webpage.

Also, consider doing something like the following (my post) to
allow communication with postmaster in the event the error is
actually on your side.

    http://lists.roaringpenguin.com/pipermail/mimedefang/2003-March/004725.html

If spammers are using their own valid addresses, there is little
we can do with stateless checks like those we're discussing.

Yours sincerely,

- -- Mark Suter <mark.suter at miju.com.au> | I have often regretted my
Miju Systems - http://www.miju.com.au/ | speech, never my silence.
mobile 0411 262 316 gnupg key 2C71D63D | Xenocrates (396-314 B.C.)
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