Re: [rt.amsl.com #7269] ietf.org mail blocking?

[James M Galvin <galvin at elistx.com>]

-- On Friday, May 09, 2008 1:14 PM -0700 Eric Rescorla 
<ekr at rtfm.com> wrote regarding Re: [rt.amsl.com #7269] ietf.org 
mail blocking? --

> > Your machine HELO'ed as "romeo.rtfm.com"... except that host
> > doesn't seem to exist or resolve:
> >
> > core3:/home/glen # host romeo.rtfm.com
> > Host romeo.rtfm.com.amsl.com not found: 3(NXDOMAIN)

Eric,

As I understand it, your email was delayed (not rejected since the 
return code was 4xx) because the name in the HELO does not exist. 
It has nothing to do with the IP address.

Have you always done this?

It should be the case that the IETF servers do not take messages 
from hosts that do not exist.  It should also be true that they 
don't care if the IP address and name do not match, for exactly the 
reason you describe.

The IETF does not apply strict connection controls but it seems 
reasonable to me to reject apparently "anonymous" messages.

Jim