mail issue
Hi all, I have an issue I haven't had before. I have an iMac and use the mail app that came with the Mac. I use btinternet.com as the host server. Over the last couple of days, I have had glitchy emails and was logged out by the system (using the Mac mail). Having spoken to BT, I am now logged back into the online BT mail app but I am still locked out of the Mac mail, which asks me for a password. I have no idea what this might be or where it might be, as I have never had to do this before. What do I do? Does anyone have a similar experience and if so did you find a solution?
iMac 27″, macOS 10.14