The mailing list for listmasters using Sympa

[address@concealed]

I am running sympa and sendmail with various virtual domains.  It is working
except in the case of moderation by email.  When my moderator receives this
message:

To distribute the attached message in list mylist:
mailto:address@concealed?subject=DISTRIBUTE%20mylist%203e674b073317773fb7e75ff
cd966d3bd
Or send a message to address@concealed with the 
following subject :
DISTRIBUTE mylist 3e674b073317773fb7e75ffcd966d3bd

he hits "reply" and a message is sent to address@concealed accordingly.  In
response, he receives this reply:

From: SYMPA [mailto:address@concealed] 
Sent: Thursday, 22 September 2005 3:21 PM
To: address@concealed
Subject: Results of your commands

List 'mylist' does not exist.

Yet, sending mail to address@concealed works.  Help!