The mailing list for listmasters using Sympa

[Johann Spies <address@concealed>]

I have been out of office for a few days and on my return I found a
lot of messages like this sent from sympa to the postmaster in
sysadm's mailbox:

.....................
> This is an automatically generated Delivery Status Notification.

Command not understood: ignoring end of message.
No command found in message
....................

This is new to me.  Sympa has been in production here for about two
months and I have never received messages like this.

Where do I look for the problem?

Regards
Johann
-- 
Johann Spies          Telefoon: 021-808 4036
Informasietegnologie, Universiteit van Stellenbosch

     "I waited patiently for the LORD; and he inclined unto 
      me, and heard my cry. He brought me up also out of an 
      horrible pit, out of the miry clay, and set my feet 
      upon a rock, and established my goings."              
                                         Psalms 40:1,2