SMTP代码在本地Windows中发送电子邮件，但不在Windows Server 2012中发送电子邮件

Question

I have set up the SMTP server in Windows Server 2012.

I have made sure it is running.

Putting a txt file in mailroot pickup folder is sending email.

The code is sending email in local Windows 7 computer.

I also set up SMTP in IIS 7.

 MailMessage mail = new MailMessage("saimanti.das@lahey.org", "saimanti.das@lahey.org");
 SmtpClient client = new SmtpClient();
 client.Port = 25;
 client.DeliveryMethod = SmtpDeliveryMethod.Network;
 client.UseDefaultCredentials = false;
 client.Host = "relaysmtp.lahey.org";
 mail.Subject = "this is a test email.";
 mail.Body = "this is my test email body";
 client.Send(mail);

Answer 1

This was really not an issue of SMTP. SMTP was working. There was a bug in my code where I was not catching the IIS 8.0 instance.

Thanks fot your help and this site is really good.