BLOG

Email authentication

The great folks over at MailChimp have compiled a list of which authentication methods (DK, DKIM, SPF and SenderID) are in use at which ISPs.
Good stuff and very clear showing who is using what authentication.

3 comments

  1. Mike says

    Or it would be, it if was correct.
    We don’t use SenderID.

  2. laura says

    You do publish SenderID, though.
    I think that chart is a way to show who is using technology either on the outbound or on the inbound. You’re not using it inbound, but are publishing it for outbound.
    ;; ANSWER SECTION:
    aol.com. 300 IN TXT “spf2.0/pra ip4:152.163.225.0/24 ip4:205.188.139.0/24 ip4:205.188.144.0/24 ip4:205.188.156.0/23 ip4:205.188.159.0/24 ip4:64.12.136.0/23 ip4:64.12.138.0/24 ip4:64.12.143.99/32 ip4:64.12.143.100/32 ip4:64.12.143.101/32 ptr:mx.aol.com ?all”
    aol.com. 300 IN TXT “v=spf1 ip4:152.163.225.0/24 ip4:205.188.139.0/24 ip4:205.188.144.0/24 ip4:205.188.156.0/23 ip4:205.188.159.0/24 ip4:64.12.136.0/23 ip4:64.12.138.0/24 ip4:64.12.143.99/32 ip4:64.12.143.100/32 ip4:64.12.143.101/32 ptr:mx.aol.com ?all”
    In my copious amounts of spare time I wanted to annotate that for inbound vs. outbound to make it clearer.

  3. Mike says

    True.
    If that’s the case its kinda strange that they don’t have SPF listed for us though, since we do publish both versions.

Comment:

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.