[Dovecot] Disk Encryption

Simon Brereton simon.buongiorno at gmail.com
Mon Mar 25 15:24:39 EET 2013

On 25 March 2013 12:30, Robert Schetterer <rs at sys4.de> wrote:
> Am 25.03.2013 11:03, schrieb Simon Brereton:
>> 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
> my meaning
> crypted mailstore makes sense in a mail archive, in germany
> you have to have a mail archive for some kind of company emails
> all these solutions have some crypted mailstore , and some
> more features for data security, but thats a big theme, to big for here
> crypt storage isnt "the saveness" per default, someone hacking the system
> and get root may hack your crypt storage too etc, also to big theme for here

Robert, indeed, this is sort of my point.  If we encrypt laptop
harddrives to prevent unauthorised access, that doesn't prevent the
possiblity of someone who already has admin access to the device from
decrypting/viewing/moving files.  What it does do is prevent
unauthorised access to the data if there is no admin access.

Currently my mail store isn't encrypted and I would like to know if it
is possible to do that, and if so, maybe get some pointers.


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