This is the software for sending and receiving E-mail. Along with basic functions as mail soft, can use SMTP over SSL and POP over SSL to Improve security. Supports SMTP Authentication ( SMTP-AUTH ) by CRAM-MD5, LOGIN,PLAINand supports APOP Authentication. Can change a character set and an encoding method. Supports RFC2231 format as an encoding method of the file name. You can buy the Source Code ( C#2005, VB2005, C#.NET, VB.NET ) of this software. Please use the Source Code of this software to develop a mailer or software having the mail send and receive function. It is also the optimum material as sample software for studying how to develop software.