popup says Mail needs to import my messages
About a week or so after installing MacOS Ventura on my 2017 iMac, I got a popup window saying "Mail needs to import your messages." When I said ok, it said it was going to download over 238,000 emails. That was shocking. Will this create duplicates of all the emails I have ever received, including those that I have deleted? I tried restarting in SafeMode but I got the same popup. Does anyone know why this happened? Should I go ahead with the massive download or just stop using Mail and login to each of the accounts I have flow into Mail for convenience? One thought I had was to delete the accounts in "Internet Accounts" in Systems Preferences and then reintroduce them. Will this work or will this erase all the mail in my accounts in Mail, including quite a few folders?
iMac (2017 – 2020)