An RFC 2822 parser.
Currently, this crate only recognizes the RFC 2822 name-addr and addr-spec productions, i.e., things of the form:
Name (Comment) <email@example.org>
and
email@example.org
Although the above appear simple to parse, RFC 2822's whitespace and comment rules are rather complex. This crate implements the whole grammar.
As an extension, in addition to ASCII, we also recognize all UTF-8
code points. NUL, controls, and specials retain their meaning as
defined in RFC 2822. Other UTF-8 code points are considered to be
text like a.
Further, we also allow dots (.) and at symbols (@) in the atom
production. That is, the atom production is extended from:
atom = [CFWS] 1*atext [CFWS]
to:
atom = [CFWS] 1*atext_or_dot_or_at [CFWS]
atext_or_dot_or_at = atext | DOT | AT
And, as such:
Professor Pippy P. Poopypants <pippy@jerome-horwitz.k12.oh.us>
is recognized as a name-addr even though RFC 2822 strictly
requires that the display-name be quoted like:
"Professor Pippy P. Poopypants" <pippy@jerome-horwitz.k12.oh.us>
Likewise,
foo@bar.com <foo@bar.com>
is recognized as a name-addr even though the @ should be quoted.
This crate does not (yet) implement the new RFC 5322.