Today, Return Path announced that AOL has joined the Return Path Certification Program.
Return Path now names "AOL, Yahoo, Microsoft, Comcast, Cox, Cloudmark, Yandex, Mail.ru, Orange, Spamassassin and SpamCop" as ISPs providing value to certified senders, along with "hundreds of others, including key international domains."
Having trouble delivering mail to AOL? Now you can add "look into Return Path Certification" to the list of things to investigate to help improve your inbox rate there.
(No word on whether or not Verizon's recently completed acquisition of AOL will have any impact with regard to certification. If I were a betting man, though, I'd put my money on AOL's mail platform becoming the dominant one in this merger.)