Though most senders may be trying to pin down why Gmail isn’t displaying their images by default, there are still other mailbox providers out there to worry about. AOL, for instance, recently disabled their reputation checker and rDNS lookup tools while many of us were enjoying the long Easter holiday weekend (thanks to Word to the Wise for the heads up).
Gmail’s Postmaster Tools and Microsoft’s SNDS may have provided more data points, but the AOL reputation check was a great way to see at-a-glance where you stood with one of the major mailbox providers. It may not have been perfect, but I must say I’m a bit sad to see it go. Chalk is up as yet another casualty in the ever-changing email landscape.