-- Am 03/08/13 15:18:49 +0100 schrieb Jan Ingvoldstad:
On Fri, Mar 8, 2013 at 2:56 PM, Michael Fischer v. Mollard
<[email protected]> wrote:
Hello,
Hi!
there is a strange difference in Exim's handling of empty local parts
»@example.net« and »""@example.net«:
mail from: <>
250 OK
rcpt to:<@example.net>
501 <@example.net>: no local part
rcpt to:<""@example.net>
250 Accepted
I would have expected that the latter address gives an "501 no local
part" as well. Is this intentional or a mistake?
It is standards compliant.
The local-part of an e-mail message (I'll stick to RFC 2821 now) must
follow:
Local-part = Dot-string / Quoted-string
Whereas a Dot-string must have at least one character (Dot-string =
Atom *("." Atom)), the Quoted-string has other requirements:
Quoted-string = DQUOTE *qcontent DQUOTE
This means that the Quoted-string must consist of a double quote,
followed by zero or more qcontent expressions, followed by a double
quote.
If there are zero qcontent expressions, you end up with:
""@example
Hi,
thanks for the explanation. But it still feels like syntax, not semantics
;-)
Michael
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