docker-mx-server/postfixadmin/postfixadmin-3.0/LICENSE.TXT

    Postfix Admin is a Web Based Management tool created for Postfix. It is
    a PHP based application that handles Postfix Style Virtual Domains and
    Users that are stored in MySQL.
    Copyright (c) 2005 High5! (Mischa Peters and others)

    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.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Postfix Admin version 2.1.1, Copyright (c) 2005 High5! (Mischa Peters & Contributors)
    Postfix Admin comes with ABSOLUTELY NO WARRANTY.
    This is free software, and you are welcome to redistribute it
    under certain conditions.

    High5!, hereby disclaims all copyright interest in the program
    `Postfix Admin' (which makes passes at Postfix, PHP and MySQL) written
    by Wietse Venema, PHP Group and MYSQL AB.

    Contributors: Mihau, Tarvin, SteveB, DJTremors, WhiteFox, David Osborn, 
                  David Goodwin (GingerDog), Christian Boltz (cboltz) and GregC and others.


Postfix Admin uses some libraries that come with a different license.

a) libraries shipped with PostfixAdmin 
- the Smarty templating engine is licensed under the GNU LESSER GENERAL PUBLIC 
  LICENSE Version 3 (see smarty/COPYING.lib)
- the CLI (commandline interface) is based on CakePHP which is licensed under
  the MIT license.

b) libraries not shipped with PostfixAdmin
- the XMLRPC interface and the squirrelmail plugin use the Zend Framework which is
  licensed under the New BSD License (3-clause), see http://framework.zend.com/license
- PHPUnit (used in tests/) is licensed under the BSD License (3-clause).