If you want to delete an email on your iPhone or computer, there are a few different ways to go about it. On your iPhone, open the Mail app and select the email you want to delete. Tap the three lines in the top left corner of the email and select Delete from the menu that appears. If you want to delete an email on your computer, open your email program and find the email you want to delete. Click on it and select Delete from the menu that appears. ..