On Wed, 23 Feb 2011 23:03:46 +0400
Mahmoud Khonji <m...@khonji.org> wrote:
> However, since many legit senders ignore this, it turns out that FP
> rate is too high for now.
I am unaware of a single FP from our policy of rejecting
MAIL FROM:<sen...@example.org> where example.org lacks MX, A and AAAA records.
Do you have an example of such a FP?
Also, RFC 5321 [which I realize is not yet a standard] says this:
The first step in the procedure is the MAIL command.
MAIL FROM:<reverse-path> [SP <mail-parameters> ] <CRLF>
[...] The <reverse-path> portion of the first or
only argument contains the source mailbox (between "<" and ">"
brackets), which can be used to report errors
Since an SMTP server that accepts a message and subsequently fails to
deliver it MUST report errors to the reverse-path (unless it is null),
it is reasonable to reject mail from a reverse-path that cannot
possibly accept an error report.
Regards,
David.
