Email Authentication Report
ESPC Email Authentication Report
Executive Summary:
Over the past months, the ESPCÂ’s Receiver Relations Committee, a group dedicated to helping facilitate better
understanding and ongoing dialogue between the sender community and the established receiver community,
collaborated with leading ISPs and compiled authentication information about their email programs. The result
of their efforts is a report providing a list of ISPs and the types of email authentication they currently support for
either IP-based (Sender ID and SPF) or cryptographic (DomainKeys and DKIM) solutions. The report is a
powerful representation of the broad based endorsement of authentication by receivers today.
Results:
ISP
Status
Version
Filter
Notification
Pass
Fail
AOL (aol.com)
Publishing
SPF/Sender-ID
No
None
None
CompuServe (compuserve.com)
Publishing
SPF/Sender-ID
No
None
None
Netscape (netscape.com)
Publishing
SPF/Sender-ID
No
None
None
Bellsouth (bellsouth.net)
Verifying
SPF
No
None
None
Charter (charter.net)
Publishing
SPF
No
None
None
Comcast (comcast.net)
Publishing
SPF
No
None
None
Cox (cox.net)
Testing
DKIM
No
None
None
EarthLink (earthlink.net, mindspring.com,
peoplepc.com)
Publishing
DK
No
None
None
Google (gmail.com)
Verifying/
Publishing/Signing
SPF/DK
Yes
Yes
Yes
Juno/NetZero (netzero.net, juno.com)
Publishing
SPF/Sender-ID
No
None
None
Microsoft (msn.com, hotmail.com)
Checking/Publishing SPF/Sender-ID
Yes
Yes
Yes
RoadRunner (rr.com)
Publishing
SPF
No
None
None
Verizon (verizon.net, gte.net,
bellatlantic.net)**
Publishing
SPF
No
None
None
Yahoo! (yahoo.com)
Verifying/Signing
DK
Yes
Yes
Yes
SBCGlobal (sbcglobal.net)*
Verifying/Signing
DK
Yes
Yes
Yes
Britsh Telecom (btinternet.com)
Verifying/Signing
DK
Yes
Yes
Yes
Rogers Cable (rogers.com)
Verifying/Signing
DK
Yes
Yes
Yes
Rocket Mail (rocketmail.com)
Verifying/Signing
DK
Yes
Yes
Yes
Inter