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#!/bin/bash
# Jim Lofft 06/19/2009
# find_alias_for_msmtp.sh
# popper email server was replaced by exchange. I replaced sendmail with this script
# which scans /etc/alias file for a valid domain email address and calls msmtp (http://msmtp.sourceforge.net/)
#
# changed a little by Ovidiu Constantin <ovidiu@mybox.ro> && http://blog.mybox.ro/
#
DEFAULTEMAIL="you@domain.com"
v_recipient=0
v_msg=`cat` # email message contents
MSMTP=`which msmtp || echo "/usr/local/bin/msmtp"`
#
if [ "$1" = '-i' ] ; then
v_recipient=$2 # mailx calls sendmail with -i as the 1st param and the recipient as the second param
elif [ "$1" = '-t' ] ; then # most other programs call sendmail with a -t option
v_to=`echo "$v_msg" | grep -m 1 'To: '`
v_recipient=${v_to:4:50}
else
v_recipient=$1 # no parameter, sendmail was called with the recipient as parameter
fi
#
if [ $v_recipient != 0 ] ; then
# trim spaces from recipient email address
v_recipient="${v_recipient// /}"
# see if this email is to a @ domain.com
v_domain=`expr index "{$v_recipient}" @`
# if this email isn't to a domain, then it's a local email, so
# look up the recipient in the aliases file
if [ "$v_domain" = 0 ]; then
v_find_alias=`grep "$v_recipient": /etc/aliases | awk '{print $2}'` #grep alias file
v_alias_domain=`expr index "{$v_find_alias}" @` # grep for an @domain address
if [ "$v_alias_domain" = 0 ]; then # we didn't find an @, grep alias again
v_next_alias=`grep "$v_find_alias": /etc/aliases | awk '{print $2}'`
v_alias_domain=`expr index "{$v_next_alias}" @`
if [ "$v_alias_domain" = 0 ]; then # email someone important if no @ alias is found
v_recipient=$DEFAULTEMAIL
else
v_recipient=$v_next_alias
fi
else
v_recipient=$v_find_alias
fi
fi
# Send msmtp email
echo "$v_msg" | $MSMTP -i $v_recipient
else
# we're not sure who this email is for, just send it to msmtp and see what happens..
echo "$v_msg" | $MSMTP $1 $2 $3 $4 $5
fi