Return-Path: <test@example.org>
Subject: Hello world
From: Test User <test@example.org>
To: Another User <test2@example.org>
Message-Id: <1.2.3.4@example>
Mime-Version: 1.0
Date: Sun, 23 May 2007 04:58:08 +0300
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature";
	boundary="=-GNQXLhuj24Pl1aCkk4/d"

--=-GNQXLhuj24Pl1aCkk4/d
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

There was a day=20
a happy=20day

--=-GNQXLhuj24Pl1aCkk4/d
Content-Type: application/pgp-signature; name=signature.asc

invalid

--=-GNQXLhuj24Pl1aCkk4/d--