Mike Cardwell <exim-users@???> (Di 04 Mär 2014 11:49:42 CET):
> * on the Mon, Mar 03, 2014 at 05:58:49PM +0100, Leonardo Boselli wrote:
>
> > Is possible to authenthicate the acceptance of e-email based on the GPG
> > signature, that is every message has a GPG signature, if the message
> > is signed by someone that is in the public keyring of MTA, and the
> > gignature is verifiesm, it is accepted, else is refused ?
>
> I did something similar in the past (contract work), but with S/MIME
> rather than PGP, and it just added a header to the email if S/MIME
> verification passed, rather than using it for authentication.
>
> I suspect it would be quite easy to write an embedded Perl script to do
> this using Mail::GnuPG. In Exim in the DATA ACL you would check if
> $message_body contains "-----BEGIN PGP SIGNATURE-----" and if it does,
> feed $message_headers and $message_body into the script.
$message_body contains the initial portion of the body only! Newlines
are converted into spaces.
There are some related options though, message_body_visible,
message_body_newlines
May be
message_body_visible = $message_body_size
is tempting, but, as I understand the spec, this global option
is not expanded and defaults to 500.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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