A Huge Thunderbird Issue

lynn white

Sent from my iPhoneI just set up a new laptop. When I downloaded Thunderbird, I started getting messages going back to 2015. I configured this for pop settings and all I wanted was current messages. I also keep getting these messages about remote protective view. How do you turn this off? Thanks. Oh, and is there a way to delete this mound of messages that apparently is on the mail server?

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