You can delete folders in Yahoo Mail right from your inbox's left-hand sidebar under the "Folders" label.

You can add several email accounts to Microsoft Outlook and manage both your business and personal email using the same email client. If you no longer use one of the email accounts, you can delete it ...

You can swipe to delete messages in the iPhone's Mail app, but you'll need to enable this option in Settings.

Many iPhone users know the basic organization features available in the Mail app, only dragging an email to the left to get a list of options and, from there, sending it to the trash. People may not ...