Can I make messages unable to be forwarded by the receiver?

[Jonna Kosalko]

We are interested in setting up a private email group at work that receives
semi-confidential information.

Is there a way to make the emails that these users will receive unable to be
forwarded to people outside of the group? Make private, or somehow else
prevent the information from getting outside of the approved recipient list?

 

[dlw]

no. and you can't keep people from printing it, copying and pasting the
contents of it, taking a screen shot of it, etc, etc...

 

[VanguardLH]

We are interested in setting up a private email group at work that receives
semi-confidential information.

Is there a way to make the emails that these users will receive unable to be
forwarded to people outside of the group? Make private, or somehow else
prevent the information from getting outside of the approved recipient list?

Once your e-mail client has passed a message to your sending mail server,
you no longer have any control over its delivery or its content.