Email authentication

Published
by
laura
07Feb
in Asides
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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 Responses to “Email authentication”

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  1. 1 Mike
    February 22, 2008 at 2:44 pm

    Or it would be, it if was correct.

    We don’t use SenderID.

  2. 2 laura
    February 22, 2008 at 2:52 pm
    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. 3 Mike
    February 23, 2008 at 1:05 pm

    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.

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