On Thu, 26 Jun 2003 12:30:07 +0200 (Romance Daylight Time) Vadim Zeitlin <[EMAIL 
PROTECTED]> wrote:

> On Thu, 26 Jun 2003 07:34:25 +0200 (Romance Daylight Time) Xavier Nodet
> <[EMAIL PROTECTED]> wrote:
 
> XN> The other method, the one I use, is that I have a program installed
> that
> XN> acts as an SMTP proxy, and signs all my messages on the way out. This
> XN> program is GPG-Relay <http://sites.inka.de/tesla/gpgrelay.html>.
 
>  This is an interesting approach, indeed. We should probably mention
> GPG-Relay somewhere, at least until we implement our own PGP support in
> composer.

i have some untested support for signing outbound messages passing through
the exim 4 MTA, as well as tested code for auto encrypting if a public key
is found in the keyring for the recipient address.

the tested part is at

http://www.averillpark.net/exim/gpg-interface.html
 
the rest could be made available. it's got a BSD-style license.

>  What do you think would be the best way to do it? Ideally we'd add a PGP
> section to the manual...

it's probably a little different for each relaying MTA. you'll probably
want to just provider pointers to alternatives, rather than a cookbook.

you'll want a security considerations section. some security professionals
will have a conniption at the notion that the signing and the encryption
aren't being done at the mail client.

me, i just patiently explain the risks to the customer and then do what
they decide they want.

cheers,
  richard
--
Richard Welty                                         [EMAIL PROTECTED]
Averill Park Networking                                         518-573-7592
              Unix, Linux, IP Network Engineering, Security




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