When deliveries bounce *after user forwarding*, it is often hard to identify the
offending subscriber on your end, even when the bounce message is canonical
Sendmail with all the trimmings.  So ridiculing the IBM dialect of this
particular bounce is beside the point, or we might say, "unhelpful." :)

If absolutely all else fails, you can take your current roster and send
(directly, not via listserv/majordomo) a set of SERIALIZED "This is a list
test - please ignore" messages to the addresses.  I once hacked some scripts for
this, but looking just now I don't know what I did with them -- it's not hard
anyway.  Then when "TEST 0001347" bounces with that IBM message, you look at
your list and bingo, [EMAIL PROTECTED] is the culprit.

Lazlo Nibble <[EMAIL PROTECTED]> wrote:
> Well, Jack, you're not the one trying to figure out which list address is
> causing the bounce, or maybe you'd see it more my way.
>
> >> Date: Tue, 21 Jul 1998 07:48:01 EDT
> >> From: "RSCS GBIB1UQU at IBMMAIL" <[EMAIL PROTECTED]>
> >
> > A valid return address, or at least ibmmail.com is a valid host name.
>
> Unfortunately, the list in question has never had a subscriber from
> ibmmail.com -- someone is forwarding mail there from another address, and the
> bounce message doesn't include any information that would help me find out
> what that address is.  Hence: "unhelpful".

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