Image style height and width not taken in outlook mails

Put the width and height in separate attributes, with no unit: <img style=”margin: 0; border: 0; padding: 0; display: block;” src=”https://stackoverflow.com/questions/20989897/images/img.jpg” width=”120″ height=”150″> Another Option: <!–[if gte mso 9]> <style type=”text/css”> img.header { width: 600px; } /* or something like that */ </style> <![endif]–>