Procmail – Preventing Addition of Return-Path

procmail

I'm storing and forwarding (to google apps) emails using the following procmail recipe:

# set vars
USERNAME=local_username
LOCALPART=realemaillocalpart

:0
# Avoid email loops
* ! ^X-Loop: ${USERNAME}@domain\.nl
{
  :0c:   #Preserve a copy of the email
  ${DEFAULT}
  :0fwh  #Adjust some headers before forwarding
  | formail -A"X-Loop: ${USERNAME}@domain.nl" \
  # Forward the email
  :0
  !${LOCALPART}@apps.domain.nl
}

This works, but when I set up an 'out of office' message in gmail it returns the email to the forwarding system instead of to the original sender.

This probably has to do with the forwarding system adding or replacing a Return-path line and putting the local username and the servername in there.

My question is thus how can I prevent that from happening?

Best Answer

Try

# Forward the email
:0
* ^Return-Path:[  ]*\/[^  ].+
{ env=$MATCH }
:0
! ${env+-f "$env"} ${LOCALPART}@apps.domain.nl

As is customary in Procmail recipes, the whitespace inside the square brackets should consist of a space and a tab (both places where the Return-Path header is being matched. I could not write literal tabs from the mobile device I'm typing on).

Related Solutions

Procmail – Pipe to Program or Return Error to Sender

I haven't used procmail in a while honestly, so I appologize if this doesn't immediately work.

First off, the nesting in the script you had was causing problems because it pretty much cut a recipe in half. They aren't necessary anyway, so I removed them. I also simplified the structure and set it up so it will never fall through to the local mailbox.

#Preliminaries
SHELL=/bin/sh               #Use the Bourne shell (check your path!)
MAILDIR=${HOME}        #First check what your mail directory is!
LOGFILE=${MAILDIR}/procmail.log
LOG="--- Logging ${LOGFILE} for ${LOGNAME}, "
VERBOSE=yes
MAILDOMAIN='\(help\|rt\)\.\(ncom\|networklubbock\)\.com'
RT_MAILGATE="/opt/rt3/bin/rt-mailgate"
RT_URL="http://rt.ncom.com/"

LOGABSTRACT=all

### Trying to  process using the rt-mailgate script
# the following line extracts the recipient from Received-headers.
# Simply using the To: does not work, as tickets are often created
# by sending a CC/BCC to RT
TO=`formail -c -xReceived: |grep $MAILDOMAIN |sed -e 's/.*for *<*\(.*\)>* *;.*$/\1/'`
QUEUE=`echo $TO| $HOME/get_queue.pl`
ACTION=`echo $TO| $HOME/get_action.pl`
:0w 
|/usr/bin/perl $RT_MAILGATE --queue $QUEUE --action $ACTION --url $RT_URL

# the formail command below looks at the message sender and basically
# swallows the message if it's seen the sender before.  The number
# is the size of the cache file of seen addresses.  A lock file is
# used because multiple formail processes editing that cache will
# corrupt it.
:0w:no-queue.lock
| formail -rD 8192 no-queue.cache

### Upon failure, I want to send back an error message to the user, saying
###   "Queue does not exist." I took this code from the procmailex manpage.
# Don't send if this was a bounce from a mailer, and don't send if this
# message contains the header put there to indicate a loop.
:0
* !^FROM_DAEMON
* !^X-Loop: noloop@rt.ncom.com
|(formail -rI"Precedence: junk" -A"X-Loop: noloop@rt.ncom.com" ; \
  echo "The Queue or Action was invalid."; echo "--" \
  ) | $SENDMAIL -oi -t

# trash anything that falls all the way through.  This should only ever
# happen if the message was a bounce or if it was a loop.
:0
/dev/null

Hope that helps. Please comment if you have questions about any part of it and I'll try to explain. Or figure out how I goofed up if it doesn't work.

Perform an exact match on the email address in From: header using procmail

The customary procedure is to add word boundary anchors on both sides of the target address.

:0
* ^From:(.*\<)?jgordon@example\.com\>
...

If you want to match exactly two email addresses and no others, craft a regular expression which will only match those two. In your specific example, b?jgordon@example\.com will match both bjgordon and jgordon. A common similar pattern is to want to match both firstname.lastname and flastnam; a pattern for that would be (firstname\.lastname|flastnam)@example\.com.

Best Answer

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Procmail – Pipe to Program or Return Error to Sender

Perform an exact match on the email address in From: header using procmail

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