At 11:47 2002-12-09 -0500, Jefferis Peterson wrote:
Is there any time a LAN Ip would be or could be used as a legitimate message
ID? What if someone operated their own server? Just curious. But thanks for
the help.
Exactly - someone operating a server on a NAT network, where it picked up
the message from the user's client machine. Remember, outbound SMTP
doesn't require a static address, so this sort of address in a messageid
could very likely appear in legitimate messages. Rummage the procmail
archives for people looking to use procmail and formail to manage their own
email over a dynamic link, and you'll see that while not everybody does it,
there certainly are legitimate people doing it.
I was concerned that I might block legitimate mail with a generic formula.
Then don't TOSS the messages, file them into a mailbox. The fragments I
provided should have been sufficient to peg this particular source -- the
possible consistent source hostname in a received: header for example. The
simple fact that no legitimate email should have that dynamic hostname
babble for the From: address should be quite sufficient.
know that is a no-no, but since his return ip was verified and consistent
within a range, I thought... No spammer in his right mind would give that
kind of window for lawsuits].
Few spammers are worried by lawsuits.
---
Sean B. Straw / Professional Software Engineering
Procmail disclaimer: <http://www.professional.org/procmail/disclaimer.html>
Please DO NOT carbon me on list replies. I'll get my copy from the list.
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