The domain netster.com does not have an MX record.
The A record for the domain that points to 204.152.195.218 is not accepting smtp connections :
> telnet 204.152.195.218 25
Trying 204.152.195.218...
telnet: connect to address 204.152.195.218: Connection refused
You are not receiving new email becuase they do not have any mail servers accepting email connections.
It might be a good idea to grab yourself a Gmail account or register your own domain name if they are leaving you in the dark and not explaining why the service is down.
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