Email Authentication - DKIM and SPF: Which ISP's are Checking?

Editor -

At Pinpointe, we’ve been using DKIM and SPF for nearly a year for our customers – at no extra charge. 

 If you want to know more about which ISP’s are presently using Authentication and/or Authorization to verify the validity of your email (and thereby decide whether to deliver your email or possibly drop it into Ethertrash) – you can download the full table a the ESPC Coalition site here:

A brief summary is included below:

Receiver

DKIM

Domain Keys

SenderID

SPF

AOL

XX 

 

XX 

 

Bell Canada

 XX

 XX

XX 

 

Bellsouth

 XX

 

 XX

XX 

Charter

 

 

 

 XX

Comcast

 

 

XX 

XX 

Cox.net

XX 

 

 

 

Earthlink

 XX

XX 

 

XX 

Gmail

XX

XX 

 

XX 

Hotmail

 

 

 XX

 

Juno/NetZero

 

 

 XX

XX 

MSN

 

 

 XX

 

Verizon

 

 

 

XX 

Yahoo! Mail

 XX

XX 

 

 XX 


If you want to learn more about DKIM Authentication or SPF Authorization – two steps you should be taking to improve your email delivery, check out our other Blog entries:

https://www.pinpointe.com/blog/deploying-dkim-authentication-in-4-simple-steps

https://www.pinpointe.com/blog/install-an-spf-record-to-improve-email-delivery