FakingEmailWithElho.sh

#!/bin/bash

recepients=(
  "recipient@website.com"
)

sender="sender@website.com"
senderName="Sender Name"
 
# error handling
function err_exit { echo -e 1>&2; exit 1; }
 
# create message
function mail_input { 
  echo "ehlo $(hostname -f)"
  echo "MAIL FROM: <$sender>"
  echo "RCPT TO: <$1>"
  echo "DATA"
  echo "From: $senderName <$sender>"
  echo "Reply-To: $senderName <$sender>"
  echo "Subject: This is a subject"
  echo "What a great email."
  echo "."
  echo "quit"
}

# mail_input
for i in "${recepients[@]}"
do
   mail_input $i | nc localhost 25 || err_exit
done