Count domain in mail.log (Qmail)

# cat /usr/local/sbin/count_mail_per_domain.sh
#!/bin/bash
logfile=$2
domain=$3

case "$1" in
        -t)
	cat $logfile |grep "to remote" | awk '{print $14}'
					| awk -F@ '{ field = $2 }; {print "domain: " field }'
					| sort |uniq -c |sort -nr
					| awk -v totale=0 '{totale=totale+$1; print ;} END {print "Totale giorno domini: "totale;}'
            ;;

        -su)
	cat $logfile |grep "to remote"  |grep -i "$domain"
					|awk ' { field = $14 }; {print "to remote: " field }'
					| sort| uniq -c| sort -nr
					| awk -v totale=0 '{totale=totale+$1; print ;} END {print "Totale giorno domini per utente: "totale;}'
            ;;
	-s)
        cat $logfile |grep "to remote"  |grep -i "$domain" |awk '{print $14}'
                                        | awk -F@ '{ field = $2 }; {print "to remote domain: " field }'
                                        | sort| uniq -c| sort -nr
                                        | awk -v totale=0 '{totale=totale+$1; print ;} END {print "Totale giorno domini: "totale;}'

         ;;
        *)
            echo $"Usage: $0 { -t /var/log/mail.log.0 }  for print total mail for domain "
            echo $"Usage: $0 { -su /var/log/mail.log.0 domain.com } for print total mail for single domain per user"
            echo $"Usage: $0 { -s /var/log/mail.log.0 domain.com } for print total mail for single domain"
            exit 1

esac