可能设置了ReplyTo问题.可以帮忙吗?
http://msdn.microsoft.com/en-us/library/system.net.mail.mailmessage.replyto.aspx [ ^ ]或 ^ ]

Perhaps setting ReplyTo prob. can help ?
http://msdn.microsoft.com/en-us/library/system.net.mail.mailmessage.replyto.aspx[^] or http://msdn.microsoft.com/en-us/library/system.net.mail.mailmessage.replytolist.aspx[^]

那是而不是邮件发件人"，这是标题发件人:"的内容. 与帐户无关；因此此标头的内容可以是任何内容.

您为什么认为垃圾邮件发送者很难被抓住?因为创建电子邮件标准时假定Internet上的大多数参与者都是诚实的人，所以绝大多数人的确没有作弊.这就是为什么创建标准非常宽松且有点草率的原因.发送者的身份未传递或检查.几乎所有东西都可能以各种方式被伪造.

—SA

That''s not "mail from", this is the content of the header "From: ". It has nothing to do with the account; so the content of this header can be anything at all.

Why do you think the spammers are very hard to catch? Because e-mail standards were created where most players on Internet were assumed to be honest people, and the absolute majority of people really did not cheat. That''s why the standards were created very relaxed and kind of sloppy. Identity of the sender is not passed on or checked up. Nearly everything could be faked in every way.

—SA