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SMTP コマンドを自分で打ってメールを送信する

Posted at

Overview

なんでもいいからテストメール投げるとか、環境の確認とか接続テストとか。
たまに必要となる時があるけど、たまにしか必要にならないので覚えられない SMTP コマンドの叩き方のおぼえがき。

How To

xxx の部分は何らかのメッセージが出るところです。環境によって違います。説明文やドメイン名を表示する環境もあれば、250 ok みたいに一言しか返さないサーバもあります。
本当におぼえがきなので、解説はなしです。

$ telnet smtp.example.com 25
xxx (複数行)
220 xxx
HELO localhost
250 xxx
MAIL FROM:test@example.com
250 xxx
RCPT TO:test@example.com
250 xxx
DATA
354 xxx
Subject: Test
From: test@example.com
To: test@example.com

Test message...
.

250 xxx
QUIT
221 XXX
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