Click "Mail Settings" in "Featured Services" on the left ribbon, and then select "Mail Management" at the top to enter "Personal Signature Settings", where you can enter a text signature, which will be automatically inserted at the bottom of every email you send.

Step 1: Click "Email Settings" in "Featured Services" on the left ribbon.

Step 2: Select "Mail Management" at the top to enter "Personal Signature Settings".

Step 3: Enter a text signature, which will be automatically inserted at the bottom of every email you send.

Please be sure to check "Show signature with letter" at the bottom of the input box, otherwise the signature will not be displayed in the body of the letter.