Hmm. I'm pretty sure that the regex used will throw out many perfectly valid e-mail addresses - for example, "tom@Yahoo.com." is a well-formed e-mail address (a

Hmm. I'm pretty sure that the regex used will throw out many perfectly valid e-mail addresses - for example, "tom@Yahoo.com." is a well-formed e-mail address (albeit in unusual notation), yet the author parades it as an example of an invalid one. Also, some of the characters in the local part are explicitly allowed - "(" and ")", amongst others. This seriously undermines the credibility of the author.