[IMP] Same message being sent again and again

[Otto Stolz]

Hello,

on Monday evening, one of my Imp customers has sent a message to himself.
The bulk of this message's 741 kB is a text/plain attachment containing
a lot of unprintable bytes. Since, the message hase been sent to this user
again and again (about 4 times per hour), littering his INBOX.

As the MIME Boundary is different, every time, I conjecture that Imp is
generating all those copies of the message. On the other hand, the Date
field is the same, in all copies.

How can I stop this happening?
Cf. <http://www.gutenberg2000.de/goethe/gedichte/zaublehr.htm> :-)
I have installed:
   imp    2.2.7
   horde  1.2.7
   apache 1.3.23
   SunOS  5.8

Thank you in advance for your help.

Best wishes,
    Otto Stolz