+ and . have is legal in email addresses since it was standardized. Google was the first installation I know of to silently swallow periods. Plus-addressing wa

+ and . have is legal in email addresses since it was standardized. Google was the first installation I know of to silently swallow periods. Plus-addressing was well-known back in the day, but as far as I know GUI mailers more or less killed the practice by not offering support for it, and web sites written by people too smart to know how to validate email addresses ensured you can't even use them properly anymore. Ref: http://www.faqs.org/rfcs/rfc822.html http://www.faqs.org/rfcs/rfc822.html, pages 8/9.