我也遇到了同样的问题...
我用了两种方法来发送email,先是用.net自带的SmtpMail,结果说是发送成功但是却收不到邮件...
然后我尝试用jmail,用的服务器是smtp.163.com,可是却抛出异常“ System.Runtime.InteropServices.COMException: The message was undeliverable. All servers failed to receive the message
”
是不是我的smtp的设置问题呢?谢谢指教~~n___n