Try to send and receive your mail thirty minutes after you first encountered the problem. Sometimes there are network issues that will clear up in a short period of time. If you still cannot send or receive mail, check your E-Mail settings, and if they appear correct, contact Star Dot Hosting Support to help solve your problem.
If you are using a Microsoft Windows based system, try to perform a simple telnet test :
1. Open a command line window (click start -> run -> type "cmd" and press enter)
2. In the command line window, type "telnet mail.yourdomain.com 25"
If a connection is made, then the problem is likely not with our mail systems and either a connectivity issue or perhaps a mail client issue.
If there is errors or the connection times out, please open a support ticket with us and paste the information from the window , if possible.