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eliminating unbracketed numeric HELO/EHLO 's
Hi Matti,
I'm noticing an ever increasing number of unresolved (ie not in DNS)
transactions where the spam-kiddies are not using traditional
alpha-string type hostnames or bracketed IP's in the HELO/EHLO.
Is there a stanza for smtpserver.conf which can eliminate things
in general like the following (from the smtpserver log):
KDlY05060r HELO 204.171.156.87
KDlY05060w 250 relay.phys.ualberta.ca Hello 204.171.156.87
I'd like to be able to deny access altogether to all hosts that
do not present an alpha hostname or [IP], but do present numeric IP
strings.
For bracketed IP's I know it's easily accomplished with a stanza like:
\[*.*.*.*\] 999 !NO EMAIL ACCEPTED
but how to do it with ie '*.*.*.*' where the wildcard match expands to a
numeric-only unbracketed IP string?
(I'm running 2.99.55)
Thanks,
--
James S. MacKinnon Office: P-139 Avadh-Bhatia Physics Lab
Team Physics Voice : (780) 492-8226 [old AC 403]
University of Alberta email : Jim.MacKinnon@Phys.UAlberta.CA
Edmonton, Canada T6G 2N5 WWW : http://www.phys.ualberta.ca/
for all that we know the universe could cease to exist at any mo
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