Question

我正在尝试使用SmtpClient和MailMessage发送电子邮件。我尝试至少发送35次电子邮件，其中8次发送，其余26次显示以下异常：

Failure sending mail.
System
System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 74.208.5.2:25
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
--- End of inner exception stack trace ---
at System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6)
at System.Net.PooledStream.Activate(Object owningObject, Boolean async, GeneralAsyncDelegate asyncCallback)
at System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout)
at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at \Schedulers\ConsumptionAlertJob.cs:line 90

我的代码如下：

var fromAddress= new MailAddress("xxxxxxx@xxxx.com", "Info");
const string fromPassword = "xxxxxxxx";
const string subject = "test";
string body = "test body";
var smtp = new SmtpClient
{
    Host="smtp.xxxxx.com",
    Port = 25,
    EnableSsl = true,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Credentials = new System.Net.NetworkCredentail(fromAddress.Address, fromPassword)
};

using (MailMessage message= new MailMessage()
{
    Subject=subject,
    Body=body
})
{
    message.To.Add("xxxxxxxx@gmail.com");
    smtp.Send(message);
}

我以为是端口25被阻止的第一件事，但由于它正在发送1/3的电子邮件，并在其余的2/3发出例外，因此可能并非如此。在这方面的任何帮助都将受到高度赞赏。

值得一提的是，当我在控制台应用程序中运行时，所有电子邮件都已发送。仅当我尝试在Web应用程序项目ASP.net MVC中运行它并在Quartz.net中执行作业时，我才会遇到问题。

致谢

邮件发送失败。尝试多次发送电子邮件时

0 个答案: