[dmarc-discuss] DMARC thwarted already?

Murray S. Kucherawy superuser at gmail.com
Thu Jun 5 16:03:17 PDT 2014

On Thu, Jun 5, 2014 at 1:11 PM, Peter Blair via dmarc-discuss <
dmarc-discuss at dmarc.org> wrote:

> > I'd be curious about that "left off the domain" one; if an ISP were
> already
> > rejecting mail from domains that don't resolve, I doubt it would have
> been
> > delivered.
> +1 (again).
> It's a fairly prudent measure, rejecting mail with an invalid RHS with a
> 4XX series post-DATA reply.

Do you mean 5xx?  A syntactically invalid RHS doesn't seem to be something
that would be corrected by a retry later.

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