Over 3000 unread messages added on iPhone upgrade!
My new iPhone 14 pro Is on iOS 16.0.2
My Mail app connects to 4 mail accounts, using SMTP
Main one now has over 3126 unread messages in it!! When I upgraded from iPhone 12 the mailbox got 2500 messages from somewhere!!
My ISP mail server has been emptied.
But every time I open Mail app, several 100 extra messages are added to Unread total.
Some messaging are VERY important so I can’t just delete everything.
How can I delete everything older than 12 months?
Everything from certain people?
HELP!
iPhone 14 Pro Max