AOL publishes sender recommendations

In a blog post on April 28, AOL pointed to their new Sender Best Practices document. These are not things a sender must do in order to get mail delivered to AOL, but rather things that will help improve your reputation at AOL.
The recommendations are what I have been recommending for a while and there is nothing overly surprising in the recommendations.

  • Send mail users want and expect
  • Separate your mail streams
  • Suggest recipients add the From: address to their address book
  • Make it easy for recipients to unsubscribe
  • Minimize your invalid users
  • Use DKIM to authenticate email

All of these are good suggestions for sending any email to any recipient
This also adds AOL to the list of ISPs supporting DKIM. If you are not yet signing with DKIM, you should be planning the deployment path to signing.

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AOL checking DKIM

Sources tell me that AOL announced on yesterday’s ESPC call that they are now, and have been for about a week, checking DKIM inbound. This fits with a conversation I had with one of the AOL delivery team a month or so back where they were asking me about what senders would be most concerned about when / if AOL started using DKIM.
The other announcement is that AOL, like Yahoo, would like to know how you categorize your outgoing mail stream as part of the whitelisting process.
Both of these changes indicate to me that AOL will be improving the granularity of their filtering scheme. DKIM signing will let them separate out different domains and different reputations across a single sending IP address. The categorization will allow AOL to evaluate sender statistics within the context of the specific type of email. Transactional mail can have different statistics from newsletters from marketing mail. Better granularity means that poor senders will be less able to hide behind good senders. I expect to hear some wailing and gnashing of teeth about this change, but as time goes on senders will clean up their stats and their policies and, as a consequence will see their delivery improve everywhere, not just AOL.

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Predictions for 2008

I did not have a lot of predictions for what will happen with email at the beginning of the year so I did not do a traditional beginning of the year post. Over the last 3 – 4 weeks, though, I have noticed some things that I think show where the industry is going.
Authentication. In January two announcements happened that lead me to believe most legitimate mail will be DK/DKIM signed by the end of the year. AOTA announced that approximately 50% of all email was currently authenticated. They did not separate out SPF/SenderID authentication from DK/DKIM authentication, but this still suggests email authentication is being widely adopted. AOL announced they will be checking DKIM on their inbound mail. I expect more and more email will be DKIM signed in response to this announcement.
Filtering. The end of 2007 marked a steady uptick in mail being filtered or blocked by recipient domains. I expect this trend to continue throughout 2008. Recipient domains are rolling out new technology to measure complaints, evaluate reputation and monitor unwanted email in ways that tease out the bad actors from the good. This means more bad and borderline email will be blocked. Over the short term, I expect to see more good email blocked, too, but expect this will resolve itself by Q2/Q3.
Sender Improvements. As the ISPs get better at filtering, I expect that many borderline senders will discover they cannot continue to have sloppy subscription practices and still get their mail delivered. Improved authentication and better filtering let ISPs pin-point blocks. Instead of having to block by IP or by domain, they can block only some mail from a domain, or only some mail from an IP. There are a number of senders who are sending mail that users do not want mixed with mail that recipients do want. Right now, if there is more mail that recipients want in that mix, then ISPs let the mail through. This will not continue to happen through 2008. Senders will need to send mail users actively want in order to see good delivery.
Less is more. A lot of other email bloggers have talked about this, and I will echo their predictions. Less email is more. Send relevant mail that your customers want. Target, target, target. Good mailers will not send offers to their entire database, instead they will send mail to a select portion of their database.
Feedback loops. Use of feedback loops by recipient domains will continue to grow.
Mobile email. More recipients will be receiving email on mobile devices.
Suggestions for 2008

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AOL and AIM mail

Earlier this week a question came up on a mailing list. The questioner recently started seeing an increase in rejections to @aol.com addresses. These rejections said

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