Office 365 (Outlook 2011) - Delete a message
Delete messages you no longer need or want to see in your Inbox or mail folders.
- In the message list, right-click on the message and click Delete.
- In the message list, select the message (it will be highlighted), then click Delete button within Home tab.
- If a message is open in its own window, click Message > Delete.
When a message is deleted, it's moved to the Deleted Items folder.
If you want to bypass the Deleted Items folder and permanently delete a message, press Shift+Delete. You won't have an opportunity to change your mind later and recover the message.
Wait! I changed my mind
If the message you want to keep is still in the Deleted Items folder, drag the message from the Deleted Items folder to another folder. When the Deleted Items folder is emptied for POP3 (Post Office Protocol 3 (POP3): A common Internet protocol that is used to retrieve email messages from an Internet email server.), IMAP (IMAP (Internet Message Access Protocol): Unlike Internet email protocols such as POP3, IMAP creates folders on a server to store/organize messages for retrieval by other computers. You can read message headers only and select which messages to download.), and Outlook.com or other Exchange ActiveSync accounts, the message is permanently gone.
There's an exception for some Office 365/Microsoft Exchange Server accounts. Please see recovering deleted message document for further details.