Simple mail test script.

mailtest.sh

#!/bin/bash

server=`hostname`
timestamp=`date +%s`
mail_subject="${1-"$timestamp"} ($server)"
mail_address=${2-"test@example.com"}
mail_message="/tmp/$timestamp.message"
mail_program="/bin/mail"

echo "Sending test mail to $mail_address, with subject \"$mail_subject\""

echo "" > $mail_message
echo "Test from $server.  If you see this, then it worked." >> $mail_message
echo "Timestamp: $timestamp"
echo "" >> $mail_message

$mail_program -s "$mail_subject" "$mail_address" < $mail_message

rm $mail_message