On Mon, Feb 16, 2004 at 11:03:52PM +0100, Alex van den Bogaerdt wrote:
On Mon, Feb 16, 2004 at 11:06:58AM +0000, Brian Candler wrote:
MAIL FROM:<>
RCPT TO:<B(_dot_)Candler(_at_)pobox(_dot_)com>
250 OK
DATA
... this is a bounce
.
550 This bounce is not signed
The validity can be checked from the rcpt_to address, right?
If so:
MAIL FROM:<>
RCPT TO:<B(_dot_)Candler(_at_)pobox(_dot_)com>
250 OK
DATA
550 Sorry, this bounce is not real
OK yes, it could be done at the DATA initial response rather than the final
response. I guess the decision would be based on interoperability; there are
broken MTAs out there which don't handle permanent rejection properly at
certain points in the exchange, and will disconnect and keep attempting to
resend the message.
This is why exim no longer (by default) gives errors at the MAIL FROM stage,
even if the sender address cannot be validated; it waits until RCPT TO and
rejects each of the recipients instead.
Regards,
Brian.