Milter-greylist

Is it possible for milter-greylist to skip greylisting for S/MIME or PGP
signed, signed/crypted messages ?


If not, implementation seems to be easy and could be done at the milter
header stage. Checking the Content-Type header seems to be sufficient :


Thunderbird S/MIME

Content-Type: multipart/signed;
protocol="application/x-pkcs7-signature";
Content-Type: application/x-pkcs7-mime;

Evolution PGP

Content-Type: multipart/signed; micalg=pgp-sha1;
protocol="application/pgp-signature";
Content-Type: multipart/encrypted; protocol="application/pgp-encrypted";


More details for 2 mail user agent.

S/MIME
======

* Thunderbird S/MIME signed mail :

User-Agent: Thunderbird 2.0.0.19 (X11/20090110)
MIME-Version: 1.0
...
Subject: Message =?ISO-8859-15?Q?sign=E9_avec_S/MIME?=
Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms080106040709000008050704"
Content-Length: 3851
X-UID: 1550
Status: RO


* Thunderbird S/MIME signed and ciphered mail :

User-Agent: Thunderbird 2.0.0.19 (X11/20090110)
MIME-Version: 1.0
...
Subject: TEST signature et chiffrement avec S/MIME
Content-Type: application/x-pkcs7-mime; name="smime.p7m"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7m"
Content-Description: S/MIME Encrypted Message
Content-Length: 6262
X-UID: 1548
Status: RO


For PGP
=======

* Evolution Signed

Subject: Test signature PGP
...
Content-Type: multipart/signed; micalg=pgp-sha1;
protocol="application/pgp-signature"; boundary="=-wUPeojl0Ll5QW4/ozup3"
...
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.6.301d
Date: Thu, 29 Jan 2009 10:17:26 +0100
Content-Length: 703



* Evolution Signed and Ciphered

Subject: Test =?iso-8859-15?Q?sign=E9?= et chiffre
...
Content-Type: multipart/encrypted; protocol="application/pgp-encrypted";
boundary="=-fXWByXmrap85hapbFRTd"
...
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.6.301d
Date: Thu, 29 Jan 2009 10:18:53 +0100
Content-Length: 1535
...



-- 
Christian P\ufffdlissier