How to Delete E-mail Messages. Disposing of old messages will make it easier to locate the e-mail you do want. It also frees up space on your hard disk. These instructions should work for most e-mail programs.
Select the e-mail message by clicking on it.
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Press the Delete key or Delete on the toolbar, or drag the message to the Trash or Deleted Items folder.
In most e-mail programs, the messages aren't permanently deleted; they've been transferred to the Trash or Deleted Items. You can transfer the deleted messages back to an active mailbox if you change your mind. If you're sure you want to delete the messages permanently, right-click the Trash or Deleted Items and select Empty. Some programs let you set options for emptying the Trash or Deleted Items automatically. If you set this, be aware of what you specified. You can select more than one message at a time by holding the Control key when you click to select a message. To select several messages in a row, hold down the Shift key and click on the first message. Then go to the last message you want to select. Still holding down the Shift key, click on the last message. The block of messages will be selected.