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Is there a function somewhere in emacs already to parse RFC 2822-formatted email addresses? I don't particularly care for the obsolete parts, but would like to be able to parse things like "John Smith" <john.smith@example.com> into ("John Smith" . "john.smith@example.com"). I've gotten the following regex working, but I figured gnus or someone must have done this properly already.

(defconst fov-email-address-regex
  (let* ((cfws `(? (any space)))
         (atom `(any alpha digit "!#$%&*+/=?^_`{|}'~-"))
         (quoted-pair `(: "\"" (* (or (not (any "\"\\")) (: "\\" nonl))) "\""))
         (display-name `(* (or ,cfws ,atom ,quoted-pair)))
         (addr-spec `(group-n 1 (: (+ (any alpha digit ".!#$%&'*+-/=?\^_`{|}~-"))
                                   "@"
                                   (+ (any alpha digit "-")) (+ (: "." (+ (any alpha digit "-")))))))
         (angle-addr `(: ,cfws "<" ,addr-spec ">" ))
         (name-addr `(: (? ,display-name) ,angle-addr))
         (mailbox `(or ,addr-spec ,name-addr))
         (mailbox-list `(: ,mailbox (* (: "," ,mailbox))))
         (group `(: ,display-name ":" (or ,cfws ,mailbox-list) ";" ,cfws))
         (address `(or ,mailbox ,group)))
    (rx-to-string `(: string-start ,address string-end) t))
  "Regex used to parse an RFC 2822 email address.")
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    Have a look at the aliases defined in Emacs sources under lisp/mail/mail-parse.el.
    – Wojciech Gac
    Aug 3, 2017 at 12:34
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    Excellent! ietf-drums-parse-address is what I needed. If you answer, I'll accept :)
    – Felipe
    Aug 9, 2017 at 10:21
  • Glad I could help ;).
    – Wojciech Gac
    Aug 9, 2017 at 10:40
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    @Felipe Note that it is preferred to use the alias mail-header-parse-address from mail-parse instead of its current value ietf-drums-parse-address from ietf-drums, as the former comprises a standard interface and the latter may become obsolete in the future.
    – Basil
    Aug 9, 2017 at 15:17

1 Answer 1

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Have a look at the aliases defined in Emacs sources under lisp/mail/mail-parse.el.

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