I have searched the list (not very extensivly) but couldn't find anything
similar.
I encountered the following strange behavior:

8 Dec 2004 12:45:27 Processing file 1401 from [log in to unmask]
AT
8 Dec 2004 12:45:27 -> Removing unwanted MIME message parts...
-> New subscriber, will process in 10 minutes.
8 Dec 2004 12:51:42 Processing file 1402 from [log in to unmask]
AT
...
8 Dec 2004 12:55:27 Processing file 1401 from [log in to unmask]
AT
8 Dec 2004 12:55:27 -> Decoding MIME message parts...
8 Dec 2004 12:55:27 Rescheduled as: 1414
8 Dec 2004 12:55:27 Processing file 1414 from [log in to unmask]
AC.AT
8 Dec 2004 12:55:27 From [log in to unmask]: Hi
8 Dec 2004 12:55:27 To   [log in to unmask]: Unknown command - "HI".
 Try HELP.
...
8 Dec 2004 12:55:27 Sent information mail to [log in to unmask]

here ist the smtp log:

Dec  8 11:53:26 joan postfix/qmgr[3595]: 49B731F01: from=<[log in to unmask]>,
size=44381, nrcpt=1 (queue active)
Dec  8 11:53:26 joan postfix/local[16679]: 49B731F01: to=<[log in to unmask]
meduniwien.ac.at>, relay=local, delay=0, status=sent ("|/usr/local/bin/
lsv_amin /home/listserv/spool MQSeries")

i.e.
the message was definitely sent to the list. for it was the subscribers
first one it was delayed. then it was processed for listserv instead of
the list.

any clue?

karl