On Fri, Mar 17, 2000 at 05:18:57AM -0500, Chris Johnson wrote:
> On Fri, Mar 17, 2000 at 09:46:15AM +0000, Chris Green wrote:
> > Well this doesn't seem to agree with what I'm seeing, the incorrectly
> > addressed mail was sent to <someone>@enterprises.net, whereas it
> > should have been sent to <someone>@enterprise.net and I was
> > definitely getting the deferral message. If you do an nslookup on
> > enterprises.net it reurns "Non-existent host/domain".
>
> Then nslookup is telling you something it has no way of knowing. Lookups of
> enterprises.net time out; they don't return NXDOMAIN. The timeout is a
> temporary error, and qmail has no way of knowing whether this condition will
> last. According to the root servers, enterprises.net is supposed to exist, but
> none of its listed name servers is answering questions about it. This is not
> the same as a root server saying "there's no such domain," which would be a
> permanent error and would cause qmail to bounce the message immediately.
>
Yes, OK, now all is clear[ish]. Thanks very much for all the
explanations.
I'll just have to try and persuade everyone not to mis-type things in
a way that makes them look like other mail domains! :-)
Basically I suppose it's a risk of having a domain which is likely to
have other domains with similar names, it's also a risk which is
likely to increase as the net becomes bigger.
Is there a way to ask qmail to send warning messages (to the user or
to the postmaster) when such deferrals occur? This would be useful
for me to spot the occasional problem like this, as I'm running qmail
on a home system I'm hardly going to get snowed under with messages as
a consequence.
--
Chris Green ([EMAIL PROTECTED])
Home: [EMAIL PROTECTED] Work: [EMAIL PROTECTED]
WWW: http://www.isbd.co.uk/
