#!/bin/bash

# some code stripped out here

( 
echo "EHLO sender.example.com" 
echo "MAIL FROM: <test@sender.example.com>" 
echo "RCPT TO: <user@recipient.example.com>" 
echo "DATA" 
echo "From: <test@sender.example.com>" 
echo "To: <user@recipient.example.com>" 
echo "Subject: ${eventseverity}: ${eventname} on ${eventsourcename}" 
echo ""
echo "Summary:" 
echo "${eventseverity}: ${eventname} on ${eventsourcename}"
echo "${eventargs}"
echo ""
echo "." 
echo "QUIT" 
) | stdbuf -oL nc -C -i1 mailrelay.example.com 25 >/dev/null