icon-pm
and icon-contact
are using the same envelope 
http://www.iconarchive.com/show/leox-gr ... -icon.html
http://www.iconarchive.com/show/plump-i ... -icon.html
So ive come up with this.... Its silhouette inside a padlock which makes the envelope appear privatised..... Its not great as when its being resized it loses the detail, but i thought i would suggest this concept here in case a designer could come up with something better.
