change email from pop to imap 2018
Can someone tell me how to change a email account from pop to imap? I was told this will fix my email issues.
The reason i think i need to is because my ipad and phone are now downloading emails that have been deleted from my mac. I also changed the setting in email >preferences to remove from server in one week BUT email from weeks ago keep downloading anyway! this has just started recently.
iMac (21.5-inch Mid 2011), macOS High Sierra (10.13.2), Memory 20G