[whatwg] Comments on the definition of a valid e-mail address

TAMURA, Kent tkent at chromium.org
Mon Aug 24 18:45:57 PDT 2009

I was in Gmail team and wrote the email address validation code which we are
currently using.
Gmail's validation rules are:
  - require "@"
  - local-part should be
    - quoted-string without CFWS and FWS, or
    - 1*(atext / ".")    This means dot-atom-text without "." restriction.
This looseness was introduced for Japanese cell phone addresses.
  - domain-part should be [a-zA-Z0-9]+(\.[a-zA-Z0-9]+)+
     It requires at least 1 dot.  The last non-dot sequence should have at
least 2 characters.

I have never heard requests to support for non-ASCII characters other than

Software Engineer, Google

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.whatwg.org/pipermail/whatwg-whatwg.org/attachments/20090825/ce9987f3/attachment-0002.htm>

More information about the whatwg mailing list