Microsoft Outlook web mail not recognizing mailto calls

[Mark E. Powell]

The following returns a system error for a person here who is using Microsoft Outlook web mail.  This particular user also gets errors when clicking mailto HREFs in a web page.

  put "mailto:john at example.com" into tMessage
  revGoURL tMessage
  if the result is not empty then
    <error checking>
  end if

My error checking never kicks in, so the result is empty.  Any ideas on how to determine in advance if a mailto is going to work for a given user? 

Thanks

Mark