If you aren't sure how your personal domain is set up today, you can find information about its current setup, and who is providing your domain services, using the tools below.
Registrar: Go to Whois and enter your domain name. If Pobox registered your domain, the registrar will be TUCOWS INC. If another registrar is listed, you did not register your domain through Pobox.
Name Server (NS): Go to Whois and enter your domain name. If Pobox is hosting your nameservice, your first name server should be ns1.rightbox.com. If it is something else, that company is hosting your name service.
Mail Server (MX): Go to LookupServer, and enter your domain name. If Pobox is currently handling your email, your first MX server should be mx-1.pobox.com. If it is something else, that company is hosting your mail service.