如何通过 ExchangeService C# 发送电子邮件

Question

我必须通过 Exchange 发送电子邮件。 我发现我可以使用ExchangeService做到这一点。 我已经尝试了很多方法来做到这一点，但只有我得到的是错误：(440) 登录超时。

我什至不知道是凭证有问题，还是我的代码有问题。

string login = @"login";
string password = @"password";
ExchangeService service = new ExangeService();
service.Credentials = new NetworkCredential(login, password);
service.Url = new Uri(@"https://mail.exchangemail.com");

EmailMessage message = new EmailMessage(service);
message.Subject = "Interesting";
message.Body = "The proposition has been considered.";
message.ToRecipients.Add("quarkpol@gmail.com");
message.From = "quarkpol_test@gmail.com";
message.Send();

Answer 1

我在网上找到了problrm 解决方案，它有效。

using EASendMail;

string login = @"login";
string password = @"password";

SmtpMail oMail = new SmtpMail("TryIt");
SmtpClient oSmtp = new SmtpClient();

oMail.From = "from@email.com";
oMail.To = "to@email.com";
oMail.AddAttachment(fileName, fileByteArray);

oMail.Subject = "Subject";
oMail.HtmlBody = "HTMLBody";

SmtpServer oServer = new SmtpServer("mail.email.com");

oServer.Protocol = ServerProtocol.ExchangeEWS;
oServer.User = login;
oServer.Password = password;

oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

try
{
    Console.WriteLine("start to send email ...");
    oSmtp.SendMail(oServer, oMail);
    Console.WriteLine("email was sent successfully!");
}
catch (Exception ep)
{
    Console.WriteLine("failed to send email with the following error:");
    Console.WriteLine(ep.Message);
}