Write Direct to mail socket with telnet

telnet <mail server> 25

helo

MAIL FROM: [email protected]

RCPT TO: [email protected]

DATA

Subject: test

This is a test message.

.

QUIT

PLEASE NOTE, if you are using Telstra/bigpond as the relay please use:

telnet smtp.telstra.com 25

helo

MAIL FROM: <[email protected]>

RCPT TO: <[email protected]>

DATA

Subject: test

This is a test message.

.

QUIT