Re: [bitfolk] Odd mail issue - kohinoorfoods.co.uk

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Author: Andy Smith
Date:  
To: users
Subject: Re: [bitfolk] Odd mail issue - kohinoorfoods.co.uk

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gpg: Signature made Mon Dec 31 17:35:23 2012 UTC
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gpg: Good signature from "Andy Smith <andy@strugglers.net>" [unknown]
gpg: aka "Andrew James Smith <andy@strugglers.net>" [unknown]
gpg: aka "Andy Smith (UKUUG) <andy.smith@ukuug.org>" [unknown]
gpg: aka "Andy Smith (BitFolk Ltd.) <andy@bitfolk.com>" [unknown]
gpg: aka "Andy Smith (Linux User Groups UK) <andy@lug.org.uk>" [unknown]
gpg: aka "Andy Smith (Cernio Technology Cooperative) <andy.smith@cernio.com>" [unknown]
Hi Gavin,

[No MX records for kohinoorfoods.co.uk]

On Mon, Dec 31, 2012 at 03:33:31PM +0000, Gavin Westwood wrote:
> However their IT support advise: "Looking at their logs it appears that
> when they are doing the DNS lookup to find the MX records for your
> domain its unable to find any records, this to me indicates a problem
> with their DNS server, the site they have used to check
> http://centralops.net doesn't seem to find any MX records for your
> domain, but if I google MX Lookup and run the same test from at least
> the top 5 MX Lookup sites I can successfully see that the MX records are
> a.mx.apm-internet.net and b.mx.apm-internet.net
>
> As there is on one person who seems to be having this problem I would
> suggest therefore that the problem is actually with the DNS servers that
> they are using to route mail out, if multiple places were reporting the
> same problem then it may be a problem with whoever hosts your domain."
>
> Can anyone else verify that this isn't just a problem with my server?


I can't get an MX record for kohinoorfoods.co.uk from multiple VMs
on BitFolk's network, but the lack of answer is coming from what is
supposed to be their authoritative nameservers:

$ dig +short -t mx kohinoorfoods.co.uk @ns1.csiplhosting.com
$ dig +short -t mx kohinoorfoods.co.uk @ns2.csiplhosting.com
$

On further investigation, the IP addresses I am seeing for
ns{1,2}.csiplhosting.com are different to those that other sites are
seeing:

$ dig +short -t a ns1.csiplhosting.com
95.211.9.55
$ dig +short -t a ns2.csiplhosting.com
95.211.9.55

Other sites are seeing 66.228.127.200 and 66.228.127.201, which give correct answers:

$ dig +short -t mx kohinoorfoods.co.uk @66.228.127.200
10 a.mx.apm-internet.net.
20 b.mx.apm-internet.net.

Here's a squish.net traversal of how the A record for ns1.csiplhosting.com is being worked out:

http://dns.squish.net/traverses/26b4711e91bcb6a42cc7fd11b2759343/detail

From this I would suggest that csiplhosting.com have broken
something and soon most of the world is going to be getting
95.211.9.55 as the IP address of ns{1,2}.csiplhosting.com.

Cheers,
Andy

--
http://bitfolk.com/ -- No-nonsense VPS hosting