List of ISPs and the Authentication Methods they use
ISP | Authentication type |
AOL (aol.com) | SPF/Sender-ID//DKIM |
CompuServe (compuserve.com) | SPF/Sender-ID/ |
Netscape (netscape.com) | SPF/Sender-ID/ |
Bellsouth (bellsouth.net) | SPF |
Charter (charter.net) | SPF |
Comcast (comcast.net) | SPF |
Cox (cox.net) | DKIM |
Earthlink (earthlink.net, mindspring.com, peoplepc.com) | DomainKeys |
Google(gmail.com) | SPF/ DomainKeys /DKIM |
Juno/NetZero (juno.com, netzero.net) | SPF/Sender-ID |
Microsoft (msn.com, hotmail.com) | SPF/Sender-ID |
RoadRunner (rr.com) | SPF |
Verizon (verizon.net) | SPF |
Yahoo! (yahoo.com) | DomainKeys |
SBCGlobal (sbcglobal.net) | DomainKeys |
British Telecom (btinternet.com) | DomainKeys |
Rogers Cable (rogers.com) | DomainKeys |
Rocket Mail (rocketmail.com) | DomainKeys |