msmtp was written by Martin Lambers <marlam@marlam.de>

Most of the code is shared with mpop (http://mpop.sourceforge.net).

This program might use some gnulib modules, depending on your platform.
These gnulib modules were written by other authors and may have their own 
licenses. Please check the source files in the subdirectory gnulib for more 
information.

The .netrc parsing code in netrc.[ch] was taken from fetchmail 6.2.5.

Other contributors to msmtp are listed in the THANKS file.