[Spamassassin Wiki] Update of "IntegratedSpamdInPostfix" by JamieMcCarthy

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The following page has been changed by JamieMcCarthy:
http://wiki.apache.org/spamassassin/IntegratedSpamdInPostfix

The comment on the change is:
My bash's test recommends = over ==, and its trap demands TERM over SIGTERM

------------------------------------------------------------------------------
  smtp      inet  n       -       n       -       -       smtpd -o content_filter=spamassassin
  ...
  }}}
- ## you can change the maxproc to 400 if you have a strong server (dual xeon 2.8 nd above) and the preformance will be much better.
+ ## you can change the maxproc to 400 if you have a strong server (dual xeon 2.8 nd above) and the performance will be much better.
  Then, go to the end of the file, and add this:
  {{{
  # ==========================================================================
@@ -91, +91 @@

  fi
  
  # Clean up when done or when aborting.
- trap "rm -f $OUTPUT" EXIT SIGTERM
+ trap "rm -f $OUTPUT" EXIT TERM
  
  $SPAMASSASSIN -x > $OUTPUT
  return="$?"
- if [ "$return" == 1 ]; then
+ if [ "$return" = 1 ]; then
      echo "Message content rejected"
      exit $EX_UNAVAILABLE
  elif [ "$return" != 0 ]; then
      /usr/bin/logger -s -p mail.warning -t filter \
-         "Temporary SpamAssassin failure (spamc return $return)"
+         "Temporary SpamAssassin failure (spamc returned $return)"
      exit $EX_TEMPFAIL
  fi
  
@@ -165, +165 @@

  fi
  
  # Clean up when done or when aborting.
- trap "rm -f $OUTPUT" EXIT SIGTERM
+ trap "rm -f $OUTPUT" EXIT TERM
  
  $SPAMASSASSIN -x -E -u $USER > $OUTPUT
  return="$?"
- if [ "$return" == 1 ]; then
+ if [ "$return" = 1 ]; then
      $NEW_COMMAND < $OUTPUT
      exit $?
  elif [ "$return" != 0 ]; then
-     /usr/bin/logger -s -p mail.warning -t filter "Temporary SpamAssassin failure (spamc return $return)"
+     /usr/bin/logger -s -p mail.warning -t filter "Temporary SpamAssassin failure (spamc returned $return)"
      exit $EX_TEMPFAIL
  fi
  
@@ -181, +181 @@

  exit $?
  }}}
  
- This causes incoming smtp mail to be checked for spam.  If the mail's spam score exceeds the threshold (set in local.cf, or in ~/.spamassassin/user_prefs) then it is redirected to the spamvac account.  Otherwise it is passed on to the intended recipient.  Bounces no longer occur except on a true error condition.
+ This causes incoming smtp mail to be checked for spam.  If the mail's spam score exceeds the threshold (set in local.cf, or in ~/.spamassassin/user_prefs) then `spamc -E` returns 1 and the mail is redirected to the spamvac account.  Otherwise it is passed on to the intended recipient.  Bounces no longer occur except on a true error condition.