user e-mail not valid


Well-known member
a user registered at my website, but he was using an e-mail-address which is not valid.
So I received an error-mail saying the "account confirmation mail" could not be delivered to this user.

So it is fine that this user is actually not shown in the Members-List at the website, but this user is still showing wwithin the ACP.

What should I do: delete this user in ACP or not ?