Procmail

Procmail is used to handle logbook-related mails (and something else ?). Config file is /home/clasmail/.procmailrc:

#  .procmailrc
#  redirects logbook email acknowledgements to logbook_mail_ack,logbook_mail_resolve
#  E.Wolin, 24-aug-99
###PATH=$HOME/bin:/usr/bin:/apps/bin:/bin:/apps/java/bin/java:/usr/local/release/current/bin:/usr/local/clas/release/current/source/coda/common/scripts
MAILDIR=$HOME/Mail       #you'd better make sure it exists
LOGFILE=$MAILDIR/from    #recommended
SHELL = /bin/csh
#  process logbook email
#  store all messages
:0 c
all_received
#  unacknowledged
:0
* ^Subject: Re:.*Unacknowledged
{
  :0 Bw
  * ^[ ]*[Aa]cknowledge
  | /bin/csh -c logbook_mail_ack
  :0 EBw
  * ^[ ]*<[ ]*[Aa]cknowledge
  | /bin/csh -c logbook_mail_ack
  :0 EBw
  * ^[ ]*[Rr]esolve
  | /bin/csh -c logbook_mail_resolve
  :0 EBw
  * ^[ ]*<[ ]*[Rr]esolve
  | /bin/csh -c logbook_mail_resolve
  :0 e
  logbook_mail_failure
}
#  unresolved
:0
* ^Subject: Re:.*Unresolved
{
  :0 Bw
  * ^[ ]*[Aa]cknowledge
  | /bin/csh -c logbook_mail_ack
  :0 EBw
  * ^[ ]*<[ ]*[Aa]cknowledge
  | /bin/csh -c logbook_mail_ack
  :0 EBw
  * ^[ ]*[Rr]esolve
  | /bin/csh -c logbook_mail_resolve
  :0 EBw
  * ^[ ]*<[ ]*[Rr]esolve
  | /bin/csh -c logbook_mail_resolve
  :0 e
  logbook_mail_failure
}
#  unknown mail
:0
unknown