MailServer uses 3rd party projects.

1. iRedMail - A ZERO COST, fully fledged, full-featured mail server solution (http://www.iredmail.org/). 

License:        GPL v2

Used major open source softwares: 

	- Postfix: SMTP service (http://www.postfix.org/)
	  
	  License:        IBM Public license v1.0
	  License File:   http://www.postfix.org/IBM-Public-License-1.0.txt
	
	- Dovecot: POP3/POP3S, IMAP/IMAPS, Managesieve service (http://www.dovecot.org/)
	
	  License:        MIT and LGPLv2
	  License File:   http://www.dovecot.org/doc/COPYING
		
	- Apache: Web server
	
	  License:        Apache License, v2.0
	  License File:   http://www.apache.org/licenses/LICENSE-2.0
	  
	- MySQL: Storing application data and/or mail accounts
	
	  License:        GPL v2 or proprietary
	  
	- Cluebringer: Postfix policy server (http://wiki.policyd.org/)
	
	  License:        GPL v2+
	  
	- SpamAssassin: content-based spam scanner (http://spamassassin.apache.org/)
	
	  License:        Apache License 2.0
	  
	- Amavisd: An interface between Postfix and SpamAssassin, ClamAV. Used for spam and virus scanning
	
	  License:        GPL v2
	  
	- ClamAV: virus scanner (http://www.clamav.net/index.html)
	
	  License:        GPL v2
	  
    - Awstats: Apache and Postfix log analyzer
	
	  License:        GPL v3
	  License File:   http://www.awstats.org/docs/awstats_license.html

	- Fail2ban: scans log files and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. (http://www.fail2ban.org/)
	
	  License:        GPL v2


2. OpenDKIM - OpenDKIM is an open source implementation of the DKIM (Domain Keys Identified Mail) sender authentication system

License:        BSD, custom:Sendmail
License File:   http://www.opendkim.org/license.html


3. Posty API - The posty_API is the core element of the posty softwarestack. It is developed to administrate a mailserver based on Postfix and Dovecot (https://posty-soft.org/doc_api.html).

License:        GPL v3


4. lockfile - The lockfile module exports a FileLock class which provides a simple API for locking files (https://pypi.python.org/pypi/lockfile/0.8).

License:        The MIT License (MIT)


5. opendbx - OpenDBX is an extremely lightweight but extensible database access library written in C. It provides an abstraction layer to all 
supported databases with a single, clean and simple interface that leads to an elegant code design automatically http://www.linuxnetworks.de/doc/index.php/OpenDBX).

License:        LGPL


6. Fusion Passanger - A fast and robust web server and application server for Ruby, Python and Node.js (https://www.phusionpassenger.com/).

License:        The MIT License (MIT)
License File:   https://github.com/phusion/passenger/blob/master/LICENSE


7. python-daemon - This library implements the well-behaved daemon specification of PEP 3143, “Standard daemon process library” (https://pypi.python.org/pypi/python-daemon/).

License:        PSF-2+


8. RVM - VM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems (https://rvm.io/).

License:        GPLv3


9. Ruby - programming language

License:        Ruby License
License File:   https://www.ruby-lang.org/en/about/license.txt


10. RubyGems - RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries 
(in a self-contained format called a "gem"), a tool designed to easily manage the installation of gems, and a server for distributing them (https://rubygems.org/).

License:        Ruby License


11. GNU Readline Library - The GNU Readline library provides a set of functions for use by applications that allow users to edit command lines 
as they are typed in (http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html).

License:        GPL v3


12. GCC - The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Java, Ada, and Go, as well 
as libraries for these languages (https://gcc.gnu.org/).

License:        GPL v3


13. Milter - Milter (portmanteau for mail filter) is an extension to the widely used open source mail transfer agents (MTA) Sendmail 
and Postfix (https://www.milter.org/).

License:        BSD


14. libbsd - This library provides useful functions commonly found on BSD systems, and lacking on others like GNU systems, thus making it easier to port 
projects with strong BSD origins, without needing to embed the same code over and over again on each project (http://libbsd.freedesktop.org/wiki/).

License:        New BSD, The MIT License (MIT)


15. GNU Libtool - GNU libtool is a generic library support script. Libtool hides the complexity of using shared libraries behind a consistent, 
portable interface (http://www.gnu.org/software/libtool/).

License:        GPL v2


16. libyaml - LibYAML is a YAML 1.1 parser and emitter written in C. (http://pyyaml.org/wiki/LibYAML).

License:        The MIT License (MIT)


17. libffi - A Portable Foreign Function Interface Library (http://sourceware.org/libffi/).

License:        AS-IS
License File:   https://github.com/atgreen/libffi/blob/master/LICENSE


18. OpenSSL - OpenSSL is based on the excellent SSLeay library developed (http://www.openssl.org/),

License:        Apache License
License File:   http://www.openssl.org/source/license.html


19. GNU Bison - Bison is a general-purpose parser generator that converts an annotated context-free grammar into a deterministic LR 
or generalized LR (GLR) parser employing LALR(1) parser tables (http://www.gnu.org/software/bison/).

License:        GPL v3


20. curl - Curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, 
Gopher, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB, SMTP, SMTPS, 
Telnet and TFTP. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, 
HTTP/2, cookies, user+password authentication (Basic, Plain, Digest, CRAM-MD5, NTLM, Negotiate and Kerberos), 
file transfer resume, proxy tunneling and more (http://curl.haxx.se/).

License:        MIT/X derivate license
License File:   http://curl.haxx.se/docs/copyright.html


21. zlib - zlib is a software library used for data compression (http://www.zlib.net/).

License:        AS-IS
License File:   http://www.zlib.net/zlib_license.html


22. sqlite-devel - This package contains the header files and development documentation for sqlite. If you like to develop programs using 
sqlite, you will need to install sqlite-devel.

License:        sqlite license
License File:   http://www.sqlite.org/copyright.html