#!/bin/bash

if [[ -z $1 ]]; then
	echo "Usage: ${0##*/} <recipient>"
	exit
fi

mailq | tail -n +2 | grep -v '^ *(' | awk 'BEGIN { RS = "" }
                  # $7=sender, $8=recipient1, $9=recipient2   
                  { if ($8 == "'$1'" && $9 == "")
                        print $1 }                          
              ' | tr -d '*!'