Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Source: https://metacpan.org/release/Mail-Sendmail Upstream-Contact: Milivoj Ivkovic Upstream-Name: Mail-Sendmail Files: * Copyright: 1998-2017, Milivoj Ivkovic License: public-domain You can use it freely. (Someone complained this is too vague. So, more precisely: do whatever you want with it, but be warned that terrible things will happen to you if you use it badly, like for sending spam, claiming you wrote it alone, or ...?) Files: debian/* Copyright: 2000, 2001, 2003, 2005, Jaldhar H. Vyas 2005, Niko Tyni 2008, Gunnar Wolf 2008, gregor herrmann 2016-2017, Florian Schlichting License: Artistic or GPL-1+ License: Artistic This program is free software; you can redistribute it and/or modify it under the terms of the Artistic License, which comes with Perl. . On Debian systems, the complete text of the Artistic License can be found in `/usr/share/common-licenses/Artistic'. License: GPL-1+ 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 1, or (at your option) any later version. . On Debian systems, the complete text of version 1 of the GNU General Public License can be found in `/usr/share/common-licenses/GPL-1'.