服务器响应为：5.7.0必须首先发出STARTTLS命令。 i16sm1806350pag.18 - gsmtp [英] The server response was: 5.7.0 Must issue a STARTTLS command first. i16sm1806350pag.18 - gsmtp

问题描述

我尝试使用Gmail发送邮件，而我得到一个例外是 SMTP服务器要求安全连接或客户端未通过身份验证。服务器响应为：5.7.0必须首先发出STARTTLS命令。 i16sm1806350pag.18 - gsmtp

I am try to sending mail using gmail, and I am getting an exception that is The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. i16sm1806350pag.18 - gsmtp

code我已发送邮件写的

code I have written for sending mail is

            MailMessage mail = new MailMessage(); 
            mail.To.Add(txtEmail.Text.Trim()); 
            mail.To.Add("[e-mail]");
            mail.From = new MailAddress("[e-mail]");
            mail.Subject = "Confirmation of Registration on Job Junction.";
            string Body = "Hi, this mail is to test sending mail using Gmail in ASP.NET";
            mail.Body = Body;
            mail.IsBodyHtml = true;
            SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
           // smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
            smtp.Credentials = new System.Net.NetworkCredential("[e-mail]", "password");
           // smtp.Port = 587;
            //Or your Smtp Email ID and Password
            smtp.UseDefaultCredentials = false;
          // smtp.EnableSsl = true;
            smtp.Send(mail);

请告诉我的解决方案我不为这个异常得到任何解决方案。

Please tell me solutions I am not getting any solutions for this exceptions.

推荐答案

Gmail要求您使用安全连接。这可以在你的web.config中设置这样的：

Gmail requires you to use a secure connection. This can be set in your web.config like this:

<network host="smtp.gmail.com" enableSsl="true" ... />

或

在SSL应启用Web服务器为好。
请参考以下链接

The SSL should be enable on the webserver as well. Refer following link

<一个href=\"http://weblogs.asp.net/scottgu/archive/2007/04/06/tip-trick-enabling-ssl-on-iis7-using-self-signed-certificates.aspx\">Enabling在IIS 7.0 SSL

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