From: Adam Jacob Muller (lists-postfixadam.gs)
Date: Wed Dec 27 2006 - 07:07:04 CST

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Just FYI so you know who to ask nicely / blame / curse at / threaten:

--(08:03:%)-- dig 194.9.99.63.in-addr.arpa
chia.arin.net --
(Wed,Dec27)--
;; AUTHORITY SECTION:
99.63.in-addr.arpa. 86400 IN NS AUTH00.NS.UU.NET.
99.63.in-addr.arpa. 86400 IN NS AUTH03.NS.UU.NET.

--(08:04:%)-- dig 194.9.99.63.in-addr.arpa
AUTH00.NS.UU.NET --
(Wed,Dec27)--
;; AUTHORITY SECTION:
9.99.63.in-addr.arpa. 21600 IN NS name1.netlabs-sp.com.
9.99.63.in-addr.arpa. 21600 IN NS name2.netlabs-sp.com.

--(08:04:%)-- dig 194.9.99.63.in-addr.arpa name1.netlabs-
sp.com --(Wed,Dec27)--
;; AUTHORITY SECTION:
194.9.99.63.in-addr.arpa. 43200 IN NS ns0.dnsmadeeasy.com.
194.9.99.63.in-addr.arpa. 43200 IN NS ns1.dnsmadeeasy.com.

(output truncated for brevity)

-Adam

On Dec 27, 2006, at 7:08 AM, Tom Allison wrote:

> Michael Wang wrote:
>> tom wrote:
>>> I'm trying to set up my box and I keep getting rejected from:
>>>
>>> smtp-source: fatal: recipient rejected: 450 4.7.1 Client host
>>> rejected: cannot find your hostname, [63.99.9.194]
>> There's no reverse lookup on that IP address. E.g. if you do
>> nslookup 63.99.9.194
>> it fails.
>> You need to talk to the network service provider that controls
>> that IP address and have them add a DNS entry to point it to your
>> domain or at least somewhere (i.e. it just can't fail).
>
> Figured this out after a few minutes...
>
> Something must be broken somewhere because none of my domains have
> reverse DNS anymore and I *know* that they used to work because I
> wouldn't set that as a restriction on my mail server if I couldn't
> support it myself.
>
> I think I'm starting on a long and annoying journey of finger
> pointing between the DNS host and the domain host... And it's been
> a long time since I really had to sort all this domain stuff out.

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