From: Vidar Hokstad <vidar.hokstad@...>
Date: 2008-01-30T00:49:58+09:00
Subject: Re: Treetop Email Parser

On Jan 28, 10:22 pm, Phrogz <phr...@mac.com> wrote:
> The only 'cheat' I did was to omit any of the branches of the grammar
> that were marked as obsolete (and yet included?) in the spec.

The "obsolete" productions were not obsolete in RFC 822, and hence
there may still be
a significant number of clients out there _capable_ of emitting e-mail
addresses using
that syntax.

However, in practice, most clients generate a very limited subset of
RFC 822 and/or
RFC 2822 compliant addresses - it's likely safe to ignore the obsolete
rules. 8-9
years ago, when I used to run a webmail system with 1-2 million
accounts, we didn't
even bother trying to parse the full RFC as we never saw e-mail coming
in using the more
"exotic" features, such as nested comments or quoted local parts.

Vidar