Send Email Using Telnet

May 17, 2018

Sometimes you need to check if a SMTP server is functioning correctly. This can be easily archived using telnet:

telnet <SMTP_SERVER> 25

EHLO <SMTP_SERVER>
MAIL FROM: <FROM_EMAIL_ADDRESS>
RCPT TO: <TO_EMAIL_ADDRESS>
DATA
Subject: Test
<ENTER>
<ENTER>
This is a test email.
<ENTER>
<ENTER>
.
QUIT