Re: Eliding quotes in envelope? (Re: New spammer exploit ...)

[Bruno Wolff III]

On Mon, Jul 19, 1999 at 06:30:51PM -0400,
  Scott Schwartz <[EMAIL PROTECTED]> wrote:
> To make this more concrete, consider the following:
> 
>       RCPT TO:<"A B"@ARPA>
> 
> That can be parsed by the grammer given in rfc821.  On the other
> hand, this cannot:
> 
>       RCPT TO:<A B@ARPA>
> 
> because ``A B'' contains an SP, which must be quoted somehow.
> 
> If you send a message via qmail-smtpd to the first recipient above, the
> second one is what you'll see in the text of the bounce that qmail
> sends you, when it mentions the original (sic) envelope address.

The original envelope address is:
A B@ARPA

It is only encoded as:
<"A B"@ARPA>