"mso-hide" and "if !gte mso 9" to the rescue. Damn you Outlook 07-13

  Thanks to campaignmonitor.com for this one:    mso-hide: all; /* hide elements in Outlook 2007-2013 */    https://www.campaignmonitor.com/forums/topic/7405/how-to-hide-mobile-content-in-desktop-clients/    Thanks to stackoverflow.com for this one:    <!--[if !gte mso 9]><!---->  Hello World!  <!--<![endif]-->