Is it normal to see this many instances of procmail running all the time from the same user?

1413 root 0 0 1932 1932 1280 S 0 0.0 0.7 0:00 sendmail
1414 acro 0 0 760 760 604 S 0 0.0 0.2 0:00 procmail
1592 root 0 0 1936 1936 1280 S 0 0.0 0.7 0:00 sendmail
1593 acro 0 0 744 744 604 S 0 0.0 0.2 0:00 procmail
2349 root 0 0 1936 1936 1280 S 0 0.0 0.7 0:00 sendmail
2350 acro 0 0 768 768 604 S 0 0.0 0.2 0:00 procmail
2544 root 0 0 1936 1936 1280 S 0 0.0 0.7 0:00 sendmail
2545 acro 0 0 764 764 604 S 0 0.0 0.2 0:00 procmail
3259 root 0 0 1940 1940 1284 S 0 0.0 0.7 0:00 sendmail
3261 acro 0 0 760 760 604 S 0 0.0 0.2 0:00 procmail


:confused: