Mail address linked to wrong name
My main business email appears recently to be linked to a completely unknown name. When I send an email, the recent see the email is coming from "Niel ". It should say "info@business.com". I have no records of Neil Mamet anywhere. The name is not in my mail address book or contacts and I have never had any mail from, or to, that name.
Can anyone explain how I can rid my email address of this name and get the correct business name connected?
I have reset the account, rebuilt it, changed the password. etc and contact the email host.
[Edited by Moderator]
iMac (M3, 2023)