I changed ISPs and, when I set up the email account with the new ISP, I chose an mail address that begins with the same three letters as the old address. However, the entire balance of the address is totally different.

Someone at the old ISP has now been assigned my old address. That should be okay as I'm no longer with that ISP.

The problem is that Apple Mail will not allow me to fully remove the old address from Previous Recipients. When I type the first three letters of my new address the first choice is the old address. Then, if I'm doing something like sending a test email to myself, the fellow at the old ISP gets it. Grrrr.

I'm assuming that the old ISP parked something in a nook somewhere on my drive that causes it to persistently re-appear in Mail.

Any thoughts about I find and eradicate it?

Update: Problem solved. The address still lingered in an old record in Contacts. Once deleted from there, it stopped appearing at the top of the list. It does still show at the bottom under "Found in Mail" which, I suppose, is to be expected because there are old emails with that address.

Try this to remove it even from the latter list (3 methods): https://quantumtunnel.wordpress.com/2010...ocomplete-list/

The unwanted address has been completely purged from the "Previous Recipients" list and I have run a couple of tests. It will still appear in the choice list as the first three letters are typed but only under a solid line and with the caveat: (found in mail). So I assume mail does a quick search to see if the address is elsewhere. Because it is no longer at the top of the list, it can't be accidentally used, so I'm good.

Also, as soon as the fourth letter is typed, it disappears.