On Tue, Mar 18, 2003 at 11:29:36AM +0100, Florian Weimer wrote:
> Matthew Byng-Maddick <exim@???> writes:
> > With issues like this, I'm not so completely sure. I think that all
> > in all 821 is a better standard. I think that returning 554 as a
> > greeting on a public-facing MX is probably pretty stupid. Giving an
> > RST is so much better.
> The BSD sockets API doesn't allow for sending a RST to selected peer
> addresses. You have to accept the connection to get the peer address.
I appreciate this. I think that if you're sending 554 based on who is
connecting then you're an enemy of reliable mail delivery. Either an
SMTP service runs, in which case, it should speak SMTP, and adhere to
the protocol, or it doesn't in which case, you've RST the connection.
> And the practical consequences of an RST and a 554 opening message are
> quite different. 8-)
I agree, but I think that denying the message before seeing whether it
is to the postmaster is broken, whatever 2821 has to say on the issue.
MBM
--
Matthew Byng-Maddick <mbm@???> http://colondot.net/
