SMTP服务器需要安全连接或客户端未经过身份验证。服务器响应为：5.5.1需要身份验证。了解更多信息 [英] The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at

问题描述

在应用程序中工作时，它正常工作并接收邮件。当托管邮件发送失败时，我收到错误，如 SMTP服务器需要安全连接或客户端未经过身份验证。服务器响应为：5.5.1需要验证。了解更多信息请帮帮我



我的代码是

when working in the application it is working fine and receiving mail. when it is hosted message sending failed and i am getting the error like "The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at" please help me

my code is

try
{
    MailMessage Msg = new MailMessage();
    // Sender e-mail address.
    Msg.From = new MailAddress(txtemail.Text);
    // Recipient e-mail address.
    Msg.To.Add("[e-mail]");
    Msg.Subject = "Enquiry";
    Msg.Body = "Sender : " + txtemail.Text + "\n" + "Name : " + txtname.Text + "\n" + "Phone : " + txtphone.Text + "\n" + "Address:" + txtaddress.Text + "\n" + "Enquiry:" + txtenquiry.Text;
    // your remote SMTP server IP.
    SmtpClient smtp = new SmtpClient();
    smtp.Host = "smtp.gmail.com";
    smtp.Port = 587;
    smtp.Credentials = new System.Net.NetworkCredential("[e-mail]", "Password");
    smtp.EnableSsl = true;
    smtp.Send(Msg);
    ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "ASET", "<script type='text/javascript'>alert('Your Message Has Been Send ');</script>", false);
    CleaContents();
}
catch (Exception ex)
{
    lbltext.Text = ex.Message;
}

推荐答案

查看：

Look at:

Msg.From = new MailAddress(txtemail.Text);
...
smtp.Credentials = new System.Net.NetworkCredential("[e-mail]",

如果 txtemail.Text 与[e-mail]不同，Google不接受该消息：您不得代表其他人发送电子邮件（许多邮件服务器）以这种方式配置：没有提供商喜欢垃圾邮件发送者。）

If txtemail.Text is different from "[e-mail]", Google will not accept that message: you must not send an email on behalf of someone else (many mail servers are configured in this way: no provider likes spammers).

您也可以查看这些链接，希望这些能帮助您...



http://social.msdn.microsoft.com/Forums/en-US/fcde2033-2f83-46d5-911b-767023bfef93/smtpclientsend-gets-smtpexception-551-authentication-required-error?forum=netfxnetcom [ ^ ]



http ：//stackoverflow.com/questions/17227532/gmail-530-5-5-1-authentication-required-learn-more-at [ ^ ]

you can also check these links hope these are help you...

http://social.msdn.microsoft.com/Forums/en-US/fcde2033-2f83-46d5-911b-767023bfef93/smtpclientsend-gets-smtpexception-551-authentication-required-error?forum=netfxnetcom[^]

http://stackoverflow.com/questions/17227532/gmail-530-5-5-1-authentication-required-learn-more-at[^]

需要非常强大的密码，

我将帐户的密码更改为：％TGB6yhn ^ YHN5tgb，它完美无缺。

Very Strong Password is needed,
I changed my Account's Password to somthing like: %TGB6yhn^YHN5tgb and it works perfect.

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