Re: [exim] HELO id check too strict?

On 2009-11-28 at 15:05 +0900, Randy Bush wrote:
> > Just as a minor heads-up, you're talking to the author/co-author of,
>
> whoops! uncloaked. i am just another bozo on this bus.
>
> the hostname pissing contest is way old. i fall on the liberal side.
> e.g. in this case, some poor end user stuck an underscore in their
> config. i just can't expect them to be well-versed in hostname arcana.
> to the best of my memory, that HELO check was just to catch when there
> is no fqdn.
>
> and, for your daily pedantic amusement, in pure dns, foo.bar.com might
> reall be "foo.bar," a single lhs name, in the com domain. dns is 8-bit
> clean, with segments having lenth, not being dot delimited. so dots can
> be in name segments.

I have a test zone with such interesting items in it. test.globnix.net.

% host foo.bar.test.globnix.net
foo.bar.test.globnix.net has address 192.0.2.3
% host 'foo\.bar.test.globnix.net'
foo\.bar.test.globnix.net has address 192.0.2.4
% host 'shoot-self-in-foot\..test.globnix.net'
shoot-self-in-foot\..test.globnix.net has address 192.0.2.6
% host 'Philip Pennock woz ere.test.globnix.net'
Philip\032Pennock\032woz\032ere.test.globnix.net has address 192.0.2.5

Interesting seeing what breaks.

-Phil