The mailing list for listmasters using Sympa

["Daniel Bentley" <address@concealed>]

sympa.pl is continually running around 25% CPU usage, and 78% memory 
usage.  Process has been stopped and restarted (sympa.pl had to be 
killed with a -s 9, however), machine has even been rebooted, to no 
avail.

Incoming mails are received and I see "delivered to command: 
/usr/lib/sympa/bin/queue" in mail logs.  However, the emails show up 
in /var/spool/sympa/msg and sit there with no further action.  Sympa 
was running fine earlier today, no changes were made by either myself 
or any other admin.

Any suggestions...?