Mike Cardwell <[email protected]> (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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