Hi
As I understand it email headers need to be unencrypted (otherwise DKIM doesn't work). From the MUA to either Postfix, or Dovecot the connection is (or can/should be) secured with TLS/SSL.
What I would like to know is if it is possible to encrypt the mailstore? Postfix is using Dovecot for delivery so it's only Dovecot that would need to encrypt/decrypt the mailstore.
Is this possible? Is there a terrible reason to do it even if it is possible?
I realise that from MTA to MTA there's no guarantee of encryption (and in fact it's very unlikely unless keys have been exchanged), but my primary goal is supplement the physical security of the mail store of mails we already have or have sent.
Mostly just idle curiosity as to what has been done, or what could be done. What is worth doing is a separate thread entirely.
Thanks.
Simon