A signature is boilerplate text or a file that is attached to any new messages you compose. The signature appears at the bottom of your messages, much like the signature that you would write on paper documents. Often, the signature includes your phone number and other information.
Tip
If you want your signature to appear in messages you reply to or forward, select the appropriate signature from the Replies/Forwards drop-down list.
Using Your Signature
In Outlook, choose Options from the Tools menu.
Click the Mail Format tab.
Click Signatures to open the Signatures And Stationery dialog box.
From the E-Mail Account drop-down list, select the account for which you want to assign the signature.
Select a signature from the New Messages drop-down list.
Click OK twice and close the Options dialog box.
Tip
You can create custom signatures for different types of e-mail messages you create. For example, you can create a friendly signature for messages intended for family or friends.