Testing smtp manually

From time to time is really helps to be able to manually test smtp via good old telnet.   Every smtp command is provided via text commands.  Here is a simple connections:

telnet smtp.host.com 25

Send a hello command with your domain name

ehlo mail.myserver.com
250-linuxmonkey.localdomain
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

Sender address

MAIL FROM: mail@domain.ext

Destination address

RCPT TO: mail@otherdomain.ext

Input your message:

DATA
SUBJECT: MY SUBJECT
MESSAGE STUFFF

.

And you have sent a message.

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