Setting up (Internet Message Access Protocol) on your iPhone is the standard way to ensure your emails stay synchronized across all your devices. Unlike older protocols like POP3, which download and remove emails from the server, IMAP keeps your master copy on the server so you can access the same inbox on your phone, laptop, and tablet. Step-by-Step: How to Configure IMAP on iPhone
For modern iPhones (iOS 15 and later), follow these steps to add your account: How to Set Up Email on iPhone imap iphone download