This tip originally appeared in Best of TECHSHOW – Tips and Tricks courtesy of Reba Nance.

If you don’t want recipients to forward your e-mail messages or use “Reply to All,” you can disable this functionality.  Rita provided the instructions for Outlook 2007 in her original post.  I’ve added the instructions for Outlook 2010:

• Outlook 2007 – Prevent E-mail Message Recipients from Using Reply All or Forward
• Outlook 2010 – Disable Reply to All for E-mail Recipients
• Outlook 2010 – Prevent Other Outlook Recipients from Forwarding, Printing or Copying Content From Your Message

The Microsoft Research Team also offers a Disable Reply All add-in compatible with Outlook 2007, 2010, and 2013. 

As you’ve no doubt surmised, these solutions will only work if both the sender and the recipient are using Outlook.  Still, as The Wall Street Journal pointed out:

The “reply to all” button is among the most misused – and often reviled – pieces of office technology. At best, an accidental click can lead to an inbox-clogging chain of messages, or, at worst, a personal embarrassment…

Limiting its use is probably a good thing.

All Rights Reserved – Beverly Michaelis [2014]