Once I realized what I'd done, I re-created that (longtime) e-mail address, trying it as my primary and then as an alias.  Either way, I receive no e-mails, even though I always receive multiple e-mails each day.  So, when I deleted the address, I cut myself off from multiple contacts.  I don't receive e-mails to that address even when I send to myself from a different provider.

Is there any way to re-activate my address so I resume receiving e-mails?