sSMTP is licensed under the GNU General Public License (GPL)
version 2 or above.

Copyright (C) 2004-2008  Anibal Monsalve Salazar <anibal@debian.org>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

Please read the "COPYING" file in the archive root, or visit
http://www.gnu.org/licenses/gpl.html, for information about the GPL.