Outlook 2003 and earlierOutlook 2007
34%9%
Quelle: litmusapp.com Februar 2010
Quelle: http://litmus.com/resources/desktop-email-clients
Quelle: www.email-standards.org
Quelle: http://en.wikipedia.org/wiki/MIME
Quelle: http://uits.iu.edu/page/aqqd