Bcc field viewable in Mutt generated e-mails

[Wayne Pascoe]

Hi all,

If I send an e-mail in mutt and bcc some recipients, I seem to be able
to see the BCC headers in the received e-mails. Now to my mind, this
defeats the object of Bcc.

This e-mail was bcc'd to freebsd at penguinpowered.org.uk

Can anyone tell me how to disable this? Is this a mutt issue or an exim
issue ? 

Regards,

-- 
Wayne Pascoe