This is the Debian GNU/Linux prepackaged version of msmtp.
It was packaged by Julien Louis <ptitlouis@sysif.net>
from sources obtained from http://msmtp.sourceforge.net/ and is written by
Martin Lambers <marlam@users.sourceforge.net>

  Copyright (C) 2005, 2006, 2007 Martin Lambers (main developer)
  Copyright (C) 2008 Jay Soffian (src/msmtp.c : Mac OS X keychain support)
  Copyright (C) 2008 Satoru SATOH (src/msmtp.c : GNOME keyring support)

msmtp is distributed under the terms of the GNU General Public License,
version 3 or later. 

gnulib/*:
  from debian/copyright file of gnulib package :

  Copyright (C) Free Software Foundation and others (sources of various origins)

     GNULib is a collection of unrelated source files. Each source file is
     provided under a different license (including GPL, LGPL, GFDL and
     others) and includes a license headers stating the terms that apply to
     that particular file.

src/netrc.{c,h} were taken from fetchmail and are licensed under the GPLv2.
  Copyright (C) 1996, Gordon Matzigkeit <gord@gnu.ai.mit.edu>
  Copyright (C) 2001, Eric S. Raymond

doc/msmtp.{info,texi} are licensed under the GNU Free Documentation License
with the following copyright statement: 

     Permission is granted to copy, distribute and/or modify this
     document under the terms of the GNU Free Documentation License,
     Version 1.2 or any later version published by the Free Software
     Foundation; with no Invariant Sections, no Front-Cover Texts, and
     no Back-Cover Texts.  A copy of the license is included in the
     section entitled "GNU Free Documentation License".

scripts/msmtpq/{msmtpQ,msmtpq} are licensed under the GPLv3.
  Copyright (C) 2008, Chris Gianniotis

scripts/set_sendmail/set_sendmail.sh
  Copyright (C) 2008, Gautam Iyer <gi1242@users.sourceforge.net>

scripts/find_alias/find_alias_for_msmtp.sh
  Copyright (C) 2009, Jim Lofft

scripts/vim/msmtp.vim
  Copyright (C) 2008, Simon Ruderich <simon@ruderich.com>

scripts/msmtp-gnome-tool/msmtp-gnome-tool.py is licensed GPLv2 or later
  Copyright (C) 2009, Gaizka Villate <gaizkav@gmail.com>
  Copyright (C) 2010, Emmanuel Bouthenot <kolter@openics.org>

On Debian systems, the complete text of the GNU Free Documentation License
version 1.2 can be found in `/usr/share/common-licenses/GFDL-1.2'.

On Debian systems, the complete text of the GNU General
Public License version 2 can be found in `/usr/share/common-licenses/GPL-2'.

On Debian systems, the complete text of the GNU General
Public License version 3 can be found in `/usr/share/common-licenses/GPL-3'.

Debian packaging (licenced under the GPLv2) :
  Copyright (C) 2004-2007 Julien Louis <ptitlouis@sysif.net>
  Copyright (C) 2008-2010 Emmanuel Bouthenot <kolter@openics.org>