#!/bin/bash

USERNAME="$1"
[ -z "$USERNAME" ] && echo "Usage : $0 [username] [-d]" && exit 1

DEBUG=0
[ "$2" == "-d" ] && DEBUG=1

MAX_LOG=9

function search_user () {
	USER="$1"
	MAILLOG="$2"
	[ ! -f "$MAILLOG" ] && MAILLOG="$MAILLOG.gz"
        [ -f "$MAILLOG" ] && zgrep "sasl_username=$1" $MAILLOG|sed 's/.*: \([A-Z0-9]*\): client=.*$/\1/'
}

search_user $USERNAME /var/log/mail.log
for i in $( seq 1 $MAX_LOG )
do
	search_user $USERNAME /var/log/mail.log.$i
done