Some or all of verizon.net mailboxes are going to move to infrastructure hosted by AOL.
Laura Atkins of Word to the Wise reports that Verizon is saying this only affects users in Florida, Texas and California. My guess is all other Verizon email users' mailboxes will be transitioned at some future date.
I think this is good news for senders. At AOL, the postmaster team is solid, and the sending guidelines and remediation processes are pretty clear and easy. Historically, this has not always so much been the case with Verizon. In context, it probably makes sense to keep AOL as the surviving email platform, even though Verizon was the acquiring company. From this outsider's perspective, AOL seems to have the more evolved email platform.