IMAP synchronizes the email on your smartphone with the emails on the server. POP, on the other hand, downloads messages to the phone and leaves a copy on the server. Learn how to delete deleted messages from the server with Gmail, but the steps are similar for Outlook, Yahoo, and other email providers.
How do I delete emails on iPhone?
If you use POP and want to remove deleted messages from the server, you can either delete the messages again from a computer or change your email settings so the server deletes email after it is downloaded to your phone.
Here's how to change these settings in the browser version of Gmail.
On a desktop or laptop computer, open a web browser and go to Gmail.
