我尝试但这段代码不起作用请任何帮助我我的问题{" SMTP服务器需要安全连接或客户端未经过身份验证。服务器响应是：5.5.1身份验证... [英] i m try but this code not work please any help me my problem {"The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication...

问题描述

 protected void btnSend_Click(object sender, EventArgs e)
    {
        using (MailMessage mailMessage = new MailMessage())
    {
        mailMessage.From = new MailAddress("[e-mail]");
        mailMessage.Subject = txtSubject.Text.Trim();
        mailMessage.Body = txtBody.Text.Trim();
        mailMessage.IsBodyHtml = true;
        mailMessage.To.Add(new MailAddress(txtTo.Text.Trim()));
        List<httppostedfile> files = (List<httppostedfile>)Cache[this.Key];
        foreach (HttpPostedFile file in files)
        {
            mailMessage.Attachments.Add(new System.Net.Mail.Attachment(file.InputStream, Path.GetFileName(file.FileName), file.ContentType));
        }
 
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
        NetworkCred.UserName = mailMessage.From.Address;
        NetworkCred.Password = "<password>";
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mailMessage);
    }
    Cache.Remove(this.Key);
    Response.Redirect(Request.Url.AbsoluteUri);
}</password></httppostedfile></httppostedfile>

推荐答案

尝试为UseDefaultCredentials设置false值，例如：

Try to put the false value for UseDefaultCredentials like:

smtp.UseDefaultCredentials = false;

希望有所帮助：）

Hope it helps :)

在设置凭据之前，将 UseDefaultCredentials 设置为 false br />

set the UseDefaultCredentials as false before you set the Credentials

smtp.UseDefaultCredentials = false;
System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
NetworkCred.UserName = mailMessage.From.Address;
NetworkCred.Password = "<password>";
smtp.Credentials = NetworkCred;

这篇关于我尝试但这段代码不起作用请任何帮助我我的问题{" SMTP服务器需要安全连接或客户端未经过身份验证。服务器响应是：5.5.1身份验证...的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！