John Hardin wrote:
On Fri, 22 May 2009, Matus UHLAR - fantomas wrote:
I was mentioning cases where someone compares HELO to FQDN and rejects
connections if they do not match. That was indicated by the message (even
with different wording).
Ok, agreed. If they don't match don't reject, just give that a point.
However, a FQDN in the HELO being unresolvable is a valid reason to
reject. Per RFC2821 3.6 it MUST resolve.
and here I'd recommend a temporary 4xx rejection as dns issues *do*
occasionally occur :-)
