As a first step, starting this week, the majority of AOL’s MX records will point to our new combined servers. This should be transparent to any sender as those servers will operate in simple pass-through mode. This means senders with established FBLs will continue to receive them from our AOL mail infrastructure.
While we do not foresee any issues, you are welcome to reach out to the AOL postmaster team at AOL Postmaster if you should encounter anything.
Over the next few months, we will continue to make adjustments as we further combine our systems. Watch this space for additional notes in the future.
Original Reference – Update from AOL Postmaster