said by cvtek :supposedly the mail.optonline.net doesn't work any longer, must be mail.optimum.net.
C:\Documents and Settings\frdrizzt>nslookup mail.optimum.net 8.8.8.8
Server: google-public-dns-a.google.com
Address: 8.8.8.8
Non-authoritative answer:
Name: mail.optimum.net
Address: 167.206.5.250
C:\Documents and Settings\frdrizzt>nslookup mail.optonline.net 8.8.8.8
Server: google-public-dns-a.google.com
Address: 8.8.8.8
Non-authoritative answer:
Name: mail.optonline.net
Address: 167.206.5.250
They resolve to the same IP, so they both will work. The optonline.net might not be supported by reps.