On Outlook 2013, if you write :\ it becomes a slanty smily face. Give that I often am telling people where on the shared disc drives to find files, that is NOT. FUCKING. HELPFUL.
Try This....
Open Microsoft Outlook (if its not already open).
Fire up the Options panel (found under the File ribbon).
Click open the Mail tab. You should see a Spelling and Autocorrect
button. The Editor Options panel will launch.
From there, click the AutoCorrect Options
button. The AutoCorrect: English (U.S.) properties pane is what you should see next.
Under the default AutoCorrect tab, look to the Replace text as you type section.
Click the Delete button.
Repeat these steps for the other smiley auto-replacements.