Email from Apple will not delete from Apple Mail - is it malware?
I received an email from Apple on July 29th 2019, after downloading Catalina, with "Introducing... 0%" in object description. Since receiving this email (sent to my iCloud email) I noticed my Apple Mail Smartmailbox created for Apple Invoices kept increasing continuously (100s+ per minute). Like the next morning it showed I had more than 7000 emails in this folder, but they were "fantom" email because they did not appear.
I sent an email to Apple, reporting possible scam of phishing email but have received no response.
Since last mini update for Catalina, I don't see these emails anymore, except when I want to delete something (6-7 emails, for example), pop up window asks me if I'm sure I want to delete these 300s emails...
I have just know tried again to delete the "Apple Introducing 0%" email and noticed that although the message at bottom left of screen says Deleting... it was followed by receiving... 100s emails.
I quickly closed Apple Mail. I have searched online to any other persons having problems with this but to no avail.
Is this a malware? I ran disk utility but no change.
Do I have another choice than scraping my OS and re-installing. (Of course, my last backup was too long ago...)
Marie
MacBook