Mail says "Create a new account" but I have years of mail
I've been using Apple Mail on all my Macs for years. Today on a slow Wifi connection it kept trying to download mail, but after several minutes of it nothing was happening. I forced Mail to close.
Now when I click on the Mail icon it shows an empty Mail window with no accounts and wants me to create a new account. But I have several Apple, Google, and Outlook accounts in mail. It seems like it doesn't recognize them.
Is there a plist or something I can delete to point Mail to the right data? What do I do?
Thank you.