Tue, 22 Mar 1994 14:19:51 LCL
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Here's a fun one to watch out for! Yesterday morning I noticed that the
mailer @SAU.EDU was reflecting mail to the address in the RFC822 To:
line. List postings with ShortBSMTP headers were being sent right back to
the list with the only change being in the Received: lines. No big
problem since they were being detected as duplicates. The original poster
was being pestered but...
Now it gets interesting. One of the subscribers @SAU.EDU had the DIGEST
option set, and back it came to the list. But apparantly there is no
checksum in PERMVARS for digests so it wasn't deemed a duplicate. The
digest was posted to the list and of course included in the accumulation
of the digest for the new day. The From: line said [log in to unmask]
but that wasn't caught by TRAPIN even though TRAPIN contains LISTSERV@*.
There's probably a good reason for that that I don't know.
I stopped the loop by deleting *@*.SAU.EDU from all lists and adding
*@SAUNIX.SAU.EDU and *@SAU.EDU to TRAPIN so they couldn't re-subscribe.
Now for the suggestion box: Put checksums in PERMVARS for Digests and
Indices so they won't be accepted for
posting.
Glenn A. Malling (NETMAN@SUVM) or [log in to unmask]
Syracuse University Computing Services +1 (315) 443-4111
Machinery Hall Syracuse, New York 13244-1260
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