#!/bin/sh

MES='some_message'
SUB='subject'
TOO=to_addr
FROM=from_addr
HOST=$(hostname)
MAILSERVER=mailserver
(sleep 3;
  echo "helo $HOST"
  sleep 1;
  echo "mail from: $FROM"
  sleep 1;
  echo "rcpt to: $TOO"
  sleep 1;
  echo "data"
  echo "Subject: "$SUB""
  echo "From: $FROM"
  echo "To: $TOO"
  echo ""
  echo "$MES"
  sleep 1;
  echo "."
  echo "quit" ) | telnet $MAILSERVER 25