3 == Version 1.4.1 (the George Anderson and 'history' edition)
4 * don't allow domains with underscores
5 * removed extra spaces in validation messages
6 * updated tests for Rails 2.3+
8 == Version 1.4 (the Denis Ahearn edition)
9 * added ability to run validation tests without touching ActiveRecord or a database
11 == Version 1.3.1 (the Github edition)
14 == Version 1.3 (the Travis Sinnott edition)
15 * added optional MX record check
16 * now available as a gem
18 == Version 1.2.1 (the RTFM edition)
19 * added support for quoted local parts
20 * added length checks for domain and local parts
21 * corrected escaped character support for RFC 3696 Errata
22 * added :allow_blank option
23 * added :unless option
25 == Version 1.2 (the Ismael Santos Kafeltz and Michael MacDonald edition)
26 * added support for un-escaped and escaped special characters in the local part, per RFC 3696
27 * added :allow_nil option
29 == Version 1.1 (the Francis Hwang edition)
30 * moved Regexp out of class methods into the ValidatesEmailFormatOf module