Go to "Mail Options" from the mail window. Scroll down to "Signatures"

At the bottom of the edit window, there are two(2) check boxes. Check "HTML Source".

Paste or type in the link below, with the filename changed to whatever you wish to have.

 

Do not forget the quotation marks

               v                                                                     v

<IMG src="http://site url of your image/(New File Name)"> Without Parenthesis

 

 

When finished, click on the box, "Add signature to all outgoing messages"

NOTE: Important....Look at top of the page is a "Save" Command that must be clicked for final process.