C# 从SmtpClient获取SMTP服务器问候邮件

是否有任何方法可以使用.NET

SmtpClient

获取SMTP服务器问候邮件

问候语是SMTP服务器响应的第一行：

S: 220 smtp.example.com ESMTP Postfix    <----- I need this line
C: HELO relay.example.org
S: 250 Hello relay.example.org, I am glad to meet you
C: MAIL FROM:<bob@example.org>
S: 250 Ok
C: RCPT TO:<alice@example.com>
S: 250 Ok
C: RCPT TO:<theboss@example.com>
S: 250 Ok
C: DATA
S: 354 End data with <CR><LF>.<CR><LF>
C: From: "Bob Example" <bob@example.org>
C: To: "Alice Example" <alice@example.com>
C: Cc: theboss@example.com
C: Date: Tue, 15 January 2008 16:02:43 -0500
C: Subject: Test message
C:
C: Hello Alice.
C: This is a test message with 5 header fields and 4 lines in the message body.
C: Your friend,
C: Bob
C: .
S: 250 Ok: queued as 12345
C: QUIT
S: 221 Bye
{The server closes the connection}

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S:220 smtp.example.com ESMTP PostfixSmtpClient设计用于提取smtp的详细信息，例如：

您最好打开到SMTP服务器的连接，并从该服务器获得响应