Mail Server

https://mailinabox.email/
http://www.postfix.org/


http://aurellem.org/free/html/email.html
https://arstechnica.com/information-technology/2014/02/how-to-run-your-own-e-mail-server-with-your-own-domain-part-1/
https://www.digitalocean.com/community/tutorials/how-to-run-your-own-mail-server-with-mail-in-a-box-on-ubuntu-14-04

Happier Team

https://www.heytaco.chat/
https://www.growbot.io/

Active Directory Federation Service and SAML

https://msdn.microsoft.com/en-us/library/bb897402.aspx
http://jeftek.com/222/using-java-code-with-active-directory/
https://wiki.shibboleth.net/confluence/display/OS30/Home
http://nzpcmad.blogspot.sg/2013/06/saml-saml-connectivity-toolkit.html
https://msdn.microsoft.com/en-us/library/ff359101.aspx

http://shibboleth.net/products/service-provider.html

https://idp.ssocircle.com/sso/toolbox/samlDecode.jsp

https://blogs.technet.microsoft.com/askpfeplat/2014/11/02/adfs-deep-dive-comparing-ws-fed-saml-and-oauth/

https://blogs.technet.microsoft.com/askpfeplat/2014/11/23/adfs-deep-dive-planning-and-design-considerations/


https://tnegri.com/2015/10/28/active-directory-authentication-in-java/
https://docs.oracle.com/javase/tutorial/jndi/ldap/authentication.html