2014-07-07 --- 0.1.4 * bug-fixes
2014-04-03 --- 0.1.3 * implements SMTPs/TLS
2013-12-23 --- 0.1.2 * implements attached files
2011-12-12 --- 0.1.1 * bug-fixes and refine code
2011-09-10 --- 0.1.0 * first version
