DKIM implementation survey: prelim results

First off, I want to thank everyone who participated in the DKIM implementation survey. This week has been pretty hectic so far, so I haven’t had a chance to actually dig down into the data from the survey, but I thought I’d post some preliminary results.

The ESP survey had 45 respondents. 30% of those sent more than 15 million emails a month.

Of all the respondents: 40% are signing with Domain Keys, 51.1% are signing with DKIM.

Of all respondents: 79.5% are signing with Domain Keys and 78.8% are signing with DKIM to access services (whitelists or FBLs) provided by the ISPs.

50% of those not signing with Domain Keys are not doing so because customers have not requested it.  61% of those not signing with DKIM are not doing it because of technical difficulties with deployment.

The ISP survey had 16 respondents, with 37.5% handling less than 500,000 mailboxes and 18.8% handling more than 15 million mailboxes. 75% of respondents said they are not checking Domain Keys on inbound mail. 56% said they are not currently checking DKIM on inbound mail.

Only 10 ISPs answered the question if they plan to check either Domain Keys or DKIM.

  • 1 said they planned to check Domain Keys only
  • 3 said they plan to check DKIM only
  • 3 said they plan to check both
  • 3 said they plan to check neither

On a first pass it appears the ESPs are adopting domain authentication more aggressively than ISPs. It also appears one of the major driving factors in adoption was the Yahoo FBL being tied to DK/DKIM signed email.

Again, thank all of you for participating. I’ll have a more comprehensive analysis soon.


Your email address will not be published.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

  • Lost in the mists of time

    Over on the Farsight Security blog Joe St. Sauver talks about some of the early days of online abuse, on usenet. Laura and I were on the periphery of early usenet abuse, mostly as users, but Usenet (and IRC) around then were the places we both started with email abuse.No Comments

  • Ongoing Yahoo delays

    I've been hearing from folks over the last few days that they're seeing an uptick in deferrals from Yahoo! The deferrals are not uniform. ESPs report they're seeing some, but not all, customers affected. Other ESPs aren't seeing any changes. It's not just you. But it would be very worthwhile to dig into engagement and other stats. It's possible this is a new normal at Yahoo! and they're tightening filters to catch mail that doesn't fit their standards but was previously difficult to filter.No Comments

  • AOL starts using Sender Score Certification

    Good news for Sender Score Certified IPs. Return Path recently announced that AOL has joined the list of ISPs offering preferential treatment to certified IPs.  1 Comment