telnet サーバ名 ポート番号
220 xx.xxxxx.local Microsoft ESMTP MAIL Service, Version: 5.0.2195.2966 ready at Thu, 1 Nov 2001 20:08:20 +0900
HELO XX 250 xx.xxxxx.local Hello [192.168.99.17]
MAIL FROM: lightbox@nifty.com 250 2.1.0 lightbox@nifty.com....Sender OK
RCPT TO: lightbox@nifty.com 250 2.1.5 lightbox@nifty.com
DATA 354 Start mail input; end with <CRLF>.<CRLF>
subject: test AVAVAVAVAVA . 250 2.6.0 <SVaEkjNbteCdXILgQ2900000001@xx.xxxxx.local> Queued mail for delivery
QUIT 221 2.0.0 xx.xxxxx.local Service closing transmission channel ホストとの接続が切断されました。