===== Get Sendmail to Log the Subject Line of an E-mail =====

Edit ''/etc/mail/sendmail.mc''

After the MAILER () definitions, add:

  LOCAL_CONFIG
  Klog syslog
  HSubject: $>+CheckSubject
  LOCAL_RULESETS
  SCheckSubject
  R$*     $: $(log Subject: $1 $) $1

That's a tab after the ''R$*'' on the last line, not spaces.