Re: Re: Richard Lynch's Email Address ...

On Thu, 03 Nov 2005 13:42:34 +1000, Ligaya Turmelle wrote: > >>There already is: >> http://php.net/imap_rfc822_parse_adrlist >> >> > quote from user contributed notes: > > "| This function does NOT test the syntax of either the local part, or the > host part, it will permit illegal characters on either side."| contributed notes are funny sometimes considering where local-part is defined as stuff before @ RFC822 local-part = word *("." word) ; uninterpreted ; case-preserved word = atom / quoted-string atom = 1*<any CHAR except specials, SPACE and CTLs> quoted-string = <"> *(qtext/quoted-pair) <">; Regular qtext or ; quoted chars. qtext = <any CHAR excepting <">, ; => may be folded "\" & CR, and including linear-white-space> quoted-pair = "\" CHAR ; may quote any char With his long example of what goes wrong it all comes down to the address that isn't validated properly: <@example.com:foo@example.ac.uk> At first look this seems to be an odd email and one would think that it we are trying to send an email to: NULL@example.com:foo@example.ac.uk which isn't valid but the key thing is the ':' in this address, it causes the address to really become foo@example.com and the stuff before that is the 'phrase' of this address, I could bore you more on some more rfc definitions but i'll try to avoid that. I'll just mention that a phrase starts ends with a ':' and a phrase is allowed to have: phrase = 1*word ; Sequence of words And according to what word is defined as, @ isn't allowed, since it isn't quoted. So the statement that it doesn't validate local or host part is a wrong assumption, it has problems figuring out the phrase of the address. So yes does have a bug or two in address parsing, and i do wonder how often anyone even uses the phrase feature of email addresses anyway. Curt. -- http://news.zirzow.dyndns.org/