The Next Step Press and hold your Move button using a finger before un-checking the email you had just checked. Once you leave holding onto the Move button, the email must be selected to for moving over to another location. Select move to Trash as an option. Visit the All Trash folder or the Trash folder before choosing Edit followed by Delete All. Keep in mind that deleting emails will take ample time. Wrap Up The Delete Game Using the above steps to erase them all from the iPhone or iPad inbox is the easiest and most foolproof way. Keep repeating the process for any other folder/s you might want to clean up. Read More: Here’s How To Access Microsoft Office 365 Trial And Office Preview Tips To Save Your MacBook From Water Damage