发送邮件时出错 [英] error when sending mail

问题描述

你好朋友，
我正在我的网站上发送邮件，但它给出了非常常见的错误.错误是``551此邮件服务器在从本地托管的域发送邮件之前需要身份验证''.我在所有网站上都使用相同的功能.我不知道问题出在哪里，是服务器造成的.
这是我的代码.

Hello friends,
I am sending mail on my website.But it is giving very unusual error.Error is ''551 This mail server requires authentication before sending mail from a locally hosted domain''. I am using the same function on all websites.I Don''t know where the problem is, is it from server.
This is my code.

System.Web.Mail.MailMessage msg = new System.Web.Mail.MailMessage();
        //MailAddress mlAddrFrom = new MailAddress("[e-mail]");
        //MailAddress mlAddrTo = new MailAddress("[e-mail]");

        msg.From = "[e-mail]";
        msg.To = "[e-mail]";

        msg.Body = "<b>Query</b><br /><br /><br />Firstname: " + txtfirstname.Value + "<br /><br /><br />Lastname: " + txtlastname.Value + "<br /><br /><br />PhoneNo.: " + txtphone.Value +
            "<br /><br /><br />EmailAddress: " + txtemail.Value + "<br /><br /><br />Query: " + txtmessage.Value;
        msg.Subject = "Query";

        msg.Fields["http://schemas.microsoft.com/cdo/configuration/smtsperver"] = "mail.real.co.in";
        //msg.Fields["http://schemas.microsoft.com/cdo/configuration/smtpserverport"] = 25;
        //msg.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"] = 2;
        msg.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"] = 1;
        msg.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"] = "[e-mail]";
        msg.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"] = "Real";
        System.Web.Mail.SmtpMail.SmtpServer = "mail.real.co.in";
        System.Web.Mail.SmtpMail.Send(msg);
        Response.Redirect("~/thank_you/index.html");

推荐答案

尝试此代码

try this code

string subject = "mention subject here";
        try
        {
            
            string emailTo = "email";
            string emailfrom="email";
            string body = "urbody";
            MailMessage objmail = new MailMessage(emailfrom, emailTo, subject,body);
 
 
            SmtpClient smtpclnt = new SmtpClient("smtp.gmail.com", 587);
            smtpclnt.DeliveryMethod = SmtpDeliveryMethod.Network;
 
            smtpclnt.UseDefaultCredentials = true;
            smtpclnt.EnableSsl = true;
            smtpclnt.Credentials = new System.Net.NetworkCredential("username", "password");
            smtpclnt.Send(objmail);
        }
        catch (Exception ex)
        {
           
        }

您必须先登录到邮件服务器，然后才能发送此电子邮件.
因此，请确保您已连接，认证并登录到该服务器.

You need to be logged into the mail server before you can send this email.
So make sure you are connected, authenticated and logged into this server.

正如Abhinav所说，您需要登录到邮件服务器. 此处 [ ^ ]是有关操作方法的说明.

As Abhinav said, you need to be logged to the mail server. Here[^] is an explanation on how to do it.

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