Hello.
Thanks for the message. The messages I were receiving said unrecognised email and server couldn't find the address. But then suddenly it started receiving messages to the alias, but not sending. I did try the link you suggested. I finally ended by deleting the iCloud account and adding it back. Now I seem to be able to send and receive, but only to and from the @icloud.com The me.com alias doesn't send or receive mail, and I think it should as my main address works for both me.com and iCloud.com
Any ideas on this?
Anyway, the solution seemed to be to delete and re-add the iCloud account to Mail. It doesn't allow me to edit the alias now and it did before in settings. It now says just custom for the alias.
Terri