I don't know what the solution is with people changing addresses. If they haven't got you in their address book and that seems likely in your case Harvey, then they wouldn't think of informing you.

I changed my e-mail address because of spam mail.

I was in hospital for a month only to find 356 e-mails waiting for me Yes 356!! 330 of which consisted of spam mail.

I notified all my addressees accordingly of my change of address.

I have not had a lot of problems since. Just delete without bothering to read them is the best policy.