Word-to-the-wise reports that AOL will begin checking for DKIM Authentication sometime in 2009, as discussed in a recent ESPC call. They’re using DKIM to evaluate your overall “IP reputation” (check out the AOL blog for more on that). MailChimp customers, no need to worry. DKIM Authentication is included by default (and is free) in all MailChimp campaigns (that’s what this box means, in case you were wondering):