C# 服务器发送邮件失败实例分析

string host = "smtp.exmail.qq.com";//qq邮箱
 int port = 465;//25 465 587
 string from = "123456@qq.com";
 string to = "456789@qq.com";
 string userName = "123456@qq.com";
 string password = "123456";
 
 var message = new MimeMessage();
 message.From.Add(new MailboxAddress(from));
 message.To.AddRange(new MailboxAddress[] { new MailboxAddress(to) });
 message.Subject = "test subject";
 var entity = new TextPart(TextFormat.Html)
 {
 Text = "test body"
 };
 SmtpClient client = new SmtpClient();
 client.Connect(host, port, port == 465);//465端口是ssl端口
 client.Authenticate(userName, password);
 client.Send(message);
 client.Disconnect(true);

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