From: Alice <alice@example.org>
To: list@example.org
Mime-version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
        protocol="application/pgp-signature";
	boundary="boundary"
Content-Disposition: inline


--boundary
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Mallory's message goes here.

--boundary
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Mallory's signature goes here.
-----END PGP SIGNATURE-----

--boundary
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

Email copied from Alice, a list member, goes here.

--boundary
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Alice's signature goes here.
-----END PGP SIGNATURE-----

--boundary--