如何在C＃中对SMTP进行身份验证

Question

我创建使用SMTP发送消息的新ASP.NET Web应用程序。问题是smtp未被发送邮件的人验证。如何在程序中对SMTP进行身份验证？C＃是否具有一个具有用于输入用户名和密码的属性的类？

Answer 1

确保SmtpClient.Credentials 在致电后设置SmtpClient.UseDefaultCredentials = false。

该顺序很重要，因为设置SmtpClient.UseDefaultCredentials = false将重置SmtpClient.Credentials为空。

Answer 2

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);