Step 1: Click on the "Rules" drop-down on the top of the Outlook window in a section named "Move"
Step 2: Click on "Manage Rules & Alerts"
Step 3: Click on "New Rule..."
Step 4: Click on "Apply rule on messages I send" and then click "Next"
Step 5: Click "Yes" when it asks if the selection is correct
Step 6: Select nothing in the following window and hit "Next"
Step 7: Select "defer delivery by a number of minutes", then click "a number of" in the window below
Step 8: Enter number of minutes you would like to defer sending mail, then click "OK"
Step 9: Click Next
Step 10: Select nothing in the following window and click "Next"
Step 11: Name your new rule, make sure the options match the image below, and click "Finish"
