I've got an interesting situation here. I do not have the domain pointed to my Winhost servers yet. I'm trying to connect to the mail server and test the email functionality but it's giving errors that it can't resolve the domain, and when connecting by IP it gives the following error. I've tested the login and pw and they both work. The test is running from the Winhost servers. System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 188.8.131.52:25 Any ideas on what to check for next?