Generate Address List from Aliases

generate-address-list

#!/bin/bash
# Generate Address List from Aliases and drop an e-mail with an txt attachment
# Useful for importing to other mail systems that require a list of valid addresses
# for a particular domain.

if [ "$1" == "" ]
then
echo "Give me your email address..."
else
TMPFILE=`mktemp`
TMPFILE2=`mktemp`
DOM="newdomain"

cat /etc/aliases | grep -v '^$' | grep -v '^;' | awk -v d=$DOM -F\: '{ print $1"@"d }' >  $TMPFILE 
dos2unix -q $TMPFILE
mv $TMPFILE /tmp/$DOM.txt
echo "Total number of entries.." >>$TMPFILE2
wc -l /tmp/$DOM.txt | awk '{print $1}'  >>$TMPFILE2
mailx -s $DOM" address list" -a /tmp/$DOM.txt $1 <$TMPFILE2
rm /tmp/$DOM.txt
cat $TMPFILE2
rm $TMPFILE2
fi