- telnet host-to-test 25 (connect to port 25 on mail server)
- HELO sending-host
- MAIL FROM: foo@foo.com
- RCPT TO: bar@bar.com
- DATA
- (enter one blank line after DATA)
- Subject: test
To: to-user
From: from-user
(enter one blank line after From:)
test text for email
. (enter a single period by itself on the last line) - QUIT