We need to send confidential emails to our company offices abroad. Each office uses Microsoft Exchange (either 7 or 2000).
Emails sent internally e.g. from firstname.lastname@example.org to email@example.com do not go out of our network. However, emails send overseas, for example, to firstname.lastname@example.org are sent across the Internet.
Rather than installing the PGP Outlook add-in on each client PC is it possible to configure Exchange to encrypt all emails sent to specific domain addresses e.g. mycompany.co.uk, mycompany.fr. And of course, the decrypting at the recipient's Exchange server.
What if one of our overseas offices decides not to use Micrsoft Exchange; are there any other solutions?