I have a user whom sent an email an before doing so was warned that potentially harmful attachments were being sent. They were stripped from her sent items and the recipients email as well. The text in the outlook email read
outlook blocked access to the following potentially unsafe attachments package, package
I had her retrace hr steps and she used copy and paste commands to insert a .msg and .oft which we allow to send and on the retrace of her steps, it sent out.