One of my favorite free Outlook 2010 add-ins from Microsoft Research, NoReplyAll, has received an update making it even easier to use!
The NoReplyAll software prevents Outlook 2010 users from replying to all the recipients of your message or forwarding it.
The add-in uses a facility built into Outlook and Exchange that is more lightweight than information-rights management but is not exposed in the existing UI. The add-in also includes a check for common email errors, such as omitting attachments or subject lines.
Download –> NoReplyAll Add-in for Outlook 2010
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