On Thu 07 Sep 2000, Hamish Moffatt wrote:
> On Thu, Sep 07, 2000 at 12:55:07AM -0500, Joseph Carter wrote:
> > On Wed, Sep 06, 2000 at 11:37:55PM -0400, [EMAIL PROTECTED] wrote:
> > > yes. get an ISP that can do reverse DNS. YEESHHH! I'll happily bounce
> > > their mail until then.
> >
> > Are you willing to pay the difference between the cost of that user's
> > current ISP and one which meets your standard? Until then, you have
> > absolutely no right to tell someone what ISP they should use.
> In any case, reverse DNS lookup is reasonable, no matter what you think
> of DUL.
I have to agree with this. The previous time, the discussion was
using DUL to block email. This is about reverse DNS lookups
failing, which is a completely different this. If the reverse
DBS lookup fails, you either have a grossly incompetent ISP(*) or
a malicious one.
(*) Try this for size:
$ nslookup
Default Server: localhost
Address: 127.0.0.1
> set type=mx
> deanmoor.nl
Server: localhost
Address: 127.0.0.1
Non-authoritative answer:
deanmoor.nl preference = 10, mail exchanger = mail.deanmoor.nl
Authoritative answers can be found from:
deanmoor.nl nameserver = ns01.deanmoor.nl
deanmoor.nl nameserver = ns02.deanmoor.nl
mail.deanmoor.nl internet address = 193.203.225.35
ns01.deanmoor.nl internet address = 193.203.225.35
ns02.deanmoor.nl internet address = 193.203.225.36
> set type=a
> 193.203.225.35
Server: localhost
Address: 127.0.0.1
*** localhost can't find 193.203.225.35: Non-existent host/domain
> 193.203.225.36
Server: localhost
Address: 127.0.0.1
*** localhost can't find 193.203.225.36: Non-existent host/domain
> www.deanmoor.nl
Server: localhost
Address: 127.0.0.1
Non-authoritative answer:
Name: www.deanmoor.nl
Address: 193.203.225.10
> 193.203.225.10
Server: localhost
Address: 127.0.0.1
*** localhost can't find 193.203.225.10: Non-existent host/domain
It used to be a different scenario:
mail.deanmoor.nl -> 193.203.225.35 -> www.deanmoor.nl ->
193.203.225.10 -> unknown
I contacted them about this (a couple of times), but they were convinced
that their setup was correct. They also tried to convince me that I
misunderstood the problem. Yeah, right.
I recommended my client to go elsewhere for internet connectivity.
He did, and now knows that it is possible to have a reliable internet
connection. He now also pays in excess of US$1000 a year _less_ for it.
Paul Slootman
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