我怎样才能使SMTPvalidation在C＃

我创build了使用SMTP发送消息的新的ASP.NET Web应用程序。 问题是smtp没有通过谁发送消息进行身份validation。

我如何使我的程序中的SMTPvalidation？ C＃有一个类有input用户名和密码的属性吗？

Answer 1

using System.Net; using System.Net.Mail; SmtpClient smtpClient = new SmtpClient(); NetworkCredential basicCredential = new NetworkCredential("username", "password"); MailMessage message = new MailMessage(); MailAddress fromAddress = new MailAddress("[e-mail]"); smtpClient.Host = "mail.mydomain.com"; smtpClient.UseDefaultCredentials = false; smtpClient.Credentials = basicCredential; message.From = fromAddress; message.Subject = "your subject"; //Set IsBodyHtml to true means you can send HTML email. message.IsBodyHtml = true; message.Body = "<h1>your message body</h1>"; message.To.Add("[e-mail]"); try { smtpClient.Send(message); } catch(Exception ex) { //Error, could not send the message Response.Write(ex.Message); } 

你可以使用上面的代码。

Answer 2

确保在调用SmtpClient.UseDefaultCredentials = false 后设置SmtpClient.Credentials 。

顺序非常重要，因为设置SmtpClient.UseDefaultCredentials = false会将SmtpClient.Credentials重置为null。

Answer 3

在发送消息之前设置Credentials属性。

Answer 4

你如何发送消息？

System.Net.Mail命名空间中的类（可能是您应该使用的）完全支持身份validation，可以在Web.config中指定，也可以使用SmtpClient.Credentials属性。

Answer 5

要通过TLS / SSL发送消息，您需要将SmtpClient类的Ssl设置为true。

 string to = "[e-mail]"; string from = "[e-mail]"; MailMessage message = new MailMessage(from, to); message.Subject = "Using the new SMTP client."; message.Body = @"Using this new feature, you can send an e-mail message from an application very easily."; SmtpClient client = new SmtpClient(server); // Credentials are necessary if the server requires the client // to authenticate before it will send e-mail on the client's behalf. client.UseDefaultCredentials = true; client.EnableSsl = true; client.Send(message);