21 Sep
2003
21 Sep
'03
6:08 a.m.
On Sat, 20 Sep 2003, Eric A. Hall wrote:
on 9/20/2003 1:01 PM Matt Larson wrote:
We are interested in feedback on the best way within the SMTP protocol to definitively reject mail at these servers.
You need to:
1) fatally reject mail for domains that are not delegated with 5xx
-and-
2) softly reject mail for domains that are delegated with 4xx so the messages are requeed and may get to an authorized server on the next run
Used to be able to use DNS for this.
I had a thought, its a hack but.. What if you change the behaviour of the GTLD named daemons to return an NXDOMAIN response to any MX queries on non-existent domains, you will then take this whole debate on SMTP out of the equation ... Steve