SMTP 메일 서버 텔넷, 넷캣으로 이메일 전송하기

HELO tsuribori.test
MAIL FROM: admin@gayluchat.org
RCPT TO: keigo.yamazaki@tsuribori.test
DATA
From: Me<img src=0>
To: You<img src=0>
Date: Today<img src=0>
Subject: Test Message<img src=0>

This is a text message !
.

와 같은 형식으로 보낼 수 있음.

아래와 같은 규칙 형식..

What to do

The intial telnet: > symbolises your shell prompt.

The empty line between the headers and the body is important, as is the line containing only a full stop at the end of the article body.

telnet: > telnet mx1.example.com smtp
telnet: Trying 192.0.2.2...
telnet: Connected to mx1.example.com.
telnet: Escape character is '^]'.
server: 220 mx1.example.com ESMTP server ready Tue, 20 Jan 2004 22:33:36 +0200
client: HELO client.example.com
server: 250 mx1.example.com
client: MAIL from: <sender@example.com>
server: 250 Sender <sender@example.com> Ok
client: RCPT to: <recipient@example.com>
server: 250 Recipient <recipient@example.com> Ok
client: DATA
server: 354 Ok Send data ending with <CRLF>.<CRLF>
client: From: sender@example.com
client: To: recipient@example.com
client: Subject: Test message
client: 
client: This is a test message.
client: .
server: 250 Message received: 20040120203404.CCCC18555.mx1.example.com@client.example.com
client: QUIT
server: 221 mx1.example.com ESMTP server closing connection

참고링크 : http://www.anta.net/misc/telnet-troubleshooting/smtp.shtml