Re: [exim] @example.net versus ""@example.net

-- Am 03/08/13 15:18:49 +0100 schrieb Jan Ingvoldstad:

> On Fri, Mar 8, 2013 at 2:56 PM, Michael Fischer v. Mollard
> <exim-users@???> wrote:
>>
>> Hello,
>
>
> Hi!
>
>>
>>
>> there is a strange difference in Exim's handling of empty local parts
>> »@example.net« and »""@???«:
>>
>> mail from: <>
>> 250 OK
>> rcpt to:<@example.net>
>> 501 <@example.net>: no local part
>> rcpt to:<""@???>
>> 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