This is a problem at least as recent as today or yesterday.
Kickback message reads:
mtaig-mac03.mx.aol.com rejected your message to the following e-mail addresses:
ChangedNameForThisPost (changednameforthis @aol.com) <mailto:ChangeNameForThisPost@aol.com>
mtaig-mac03.mx.aol.com gave this error:
: AOL will not accept delivery of this message.
There's a problem with the recipient's mailbox. Please try resending this message. If the problem continues, please contact your helpdesk.
This happens with all AOL accounts I've sent to today or yesterday, about 6 or 7.
I have sent to all these people with no problem for years.
I can send from an aol account to my outlook/exchange mailbox, but sending back doesn't work even using ReplyTo.
I can send to one that I tried from my gmail account.