用 Telnet 寄出一封 Email

连接的 Server 已安装了 Postfix (SMTP 服务)

$ telnet member.dlinkddns.com 25
Trying 127.0.0.1...
Connected to member.dlinkddns.com.
Escape character is '^]'.
220 member.dlinkddns.com ESMTP Postfix (Ubuntu)
EHLO member.dlinkddns.com
250-member.dlinkddns.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 SMTPUTF8
MAIL FROM: <member@member.dlinkddns.com>
250 2.1.0 Ok
RCPT TO: <test@yahoo.com>
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: TEST MAIL
This is a message.
.
250 2.0.0 Ok: queued as 6B0D61A1B46
QUIT
221 2.0.0 Bye
Connection closed by foreign host.