Procmail log

My mail server is running with RH7.3 , sendmail8.11.6-15, procmail 3.22-5
it's logfile that locate in /var/log looks like:

.....
 "rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
"rocmail: Skipped "
> From memberback(_at_)reply(_dot_)kimo(_dot_)com(_dot_)tw  Wed Oct 16 11:26:43 
> 2002
 Subject:
  Folder: /var/spool/mail/monitor    

Why it shows many "rocmail: Skipped " records?,  it that right?