deleting email from Mac and devices simultaneously.
emails that I delete on my Mac still show on my iPhone and iPad. How can I get them to delete simultaneously? This is a recent issue; it used to work this way.
iPhone XS Max
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POP is the old protocol and you have to go out of your way to set up POP server
Mail today the default is IMAP— this sync all device to the server. Mail remain on the server.
SMTP is for sending mail.
Add or remove email accounts in Mail on Mac - Apple Support
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