PANDA IMAP toolkit notices:

OpenSSL 1.1.0 compatibility and switch to GNU autoconf build system was
contributed by Michael Goldschmidt, and is

 *  Copyright (C) 2016-2018 Michael Goldschmidt
 *
 *  This file is part of Panda IMAP.
 *
 *  Panda IMAP 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  Panda IMAP 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 Panda IMAP.  If not, see <http://www.gnu.org/licenses/>.

The Panda IMAP Toolkit (c-client API, dmail, imapd, ipop2d, ipop3d,
mailutil, mlock, mtest, and tmail software; and its included text) was
developed by Mark Crispin, and is

 * Copyright 2008-2010 Mark Crispin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0

Components of the Panda IMAP toolkit are based in part upon code
developed by Mark Crispin at the University of Washington, and is

 * Copyright 1988-2008 University of Washington
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0

The c-client library and mtest software are in part based upon code
developed by Mark Crispin at Stanford University, and is

 * Copyright 1988 Stanford University and was developed in the
 * Symbolic Systems Resources Group of the Knowledge Systems Laboratory
 * at Stanford University in 1987-88, and was funded by the
 * Biomedical Research Technology Program of the National Institutes of
 * Health under grant number RR-00785.