Question

您好我正在尝试使用gmail凭据发送电子邮件并调用电子邮件模板，但它发送了一个例外，即发送邮件失败

SmtpClient SmtpServer = new SmtpClient();
SmtpServer.Credentials = new System.Net.NetworkCredential("ambarishkesavarapu@gmail.com", "xxxxxx");
SmtpServer.Port = 587;
SmtpServer.Host = "smtp.gmail.com";
SmtpServer.EnableSsl = true;
message = new MailMessage();
message.Subject = "Visitor Arrived";
message.SubjectEncoding = System.Text.Encoding.UTF8;
message.IsBodyHtml = false;
message.Body = "EmailTemplate.html";
message.BodyEncoding = System.Text.Encoding.UTF8;
message.From = new MailAddress("ambarishkesavarapu@gmail.com");
message.To.Add(lblCPEmail.Text);
message.Priority = MailPriority.High;
message.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
SmtpServer.Send(message);

请帮帮我。

Answer 1

您必须使用StreamReader来读取html文件....并将MailMessage.BodyFormat属性设置为MailFormat.Html
使用此：

SmtpClient SmtpServer = new SmtpClient();
SmtpServer.Credentials = new System.Net.NetworkCredential("ambarishkesavarapu@gmail.com", "xxxxxx");
SmtpServer.Port = 587;
SmtpServer.Host = "smtp.gmail.com";
SmtpServer.EnableSsl = true;

using (StreamReader reader = File.OpenText(htmlFilePath)) // Path to your 
{                                                         // HTML file
    message = new MailMessage();
    message.Subject = "Visitor Arrived";
    message.SubjectEncoding = System.Text.Encoding.UTF8;
    message.IsBodyHtml = false;
    message.BodyEncoding = System.Text.Encoding.UTF8;
    message.From = new MailAddress("ambarishkesavarapu@gmail.com");
    message.To.Add(lblCPEmail.Text);
    message.Priority = MailPriority.High;

    message.Body = reader.ReadToEnd();  // Load the content from your file...
    //...
}
SmtpServer.Send(message);

部分取自Send a email with a HTML file as body (C#)

Answer 2

            foreach (GnrDataMailInfo dmi in lstDMI)
            {
                MailMessage mail = new MailMessage();
                mail.From = "youremail";

                SmtpClient smtp = new SmtpClient();
                smtp.Port = 25;   // [1]  port
                smtp.EnableSsl = true;
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network; // [2] Added this
                smtp.UseDefaultCredentials = false; // [3] Changed this
                smtp.Credentials = new NetworkCredential(mail.From.ToString(), "password");  // [4] Added this.
                smtp.EnableSsl = false;
                smtp.Timeout = 20000;
                smtp.Host = "yourhost";

                mail.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
                mail.BodyEncoding = System.Text.Encoding.UTF8;
                mail.HeadersEncoding = System.Text.Encoding.UTF8;
                mail.Subject = dmi.Subject;
                mail.To.Add(dmi.To);
                mail.IsBodyHtml = true;
                mail.Body = dmi.Body;

                smtp.Send(mail);
            }

Answer 3

使用端口465代替

端口465用于smtps SSL加密在任何SMTP级别通信之前自动启动。

端口587用于msa 它几乎像标准的SMTP端口。 MSA应在验证后接受电子邮件（例如在SMTP AUTH之后）。当DUL范围的网络管理员可以阻止到SMTP端口（端口25）的传出连接时，它有助于阻止外发垃圾邮件。

使用Gmail凭据通过模板发送电子邮件

3 个答案: