BT reverse ptr records
matt at darcy.demon.co.uk
Tue Jun 14 08:46:39 UTC 2005
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On Behalf
Of Barry Margolin
Sent: 14 June 2005 01:33
To: comp-protocols-dns-bind at isc.org
Subject: Re: BT reverse ptr records
In article <d8kfmq$e0p$1 at sf1.isc.org>, "C" <c at co.com> wrote:
> hope this is the best group to post this in
> i have just moved over our office to BT from easynet
> with easynet we had our dns setup so we could run a mail server from the
> office. the domain had a sub domain 'mail.mydom.com' and easynet setup a
> reverse record for this as well
> since moving to BT we have the same setup internally, however BT will not
> change their reverse dns ptr/in-addr records to match our domain and i am
They should probably delegate the reverse DNS for your whole subnet to
your DNS servers.
> worried that this will lead to mail being returned because the reverse
> does not match the domain it comes from
> is this true and if so how can i get round this
Yes, it's true. I think BT is being ridiculous. I can't believe that
an enterprise Internet connection would not include reverse DNS
Barry Margolin, barmar at alum.mit.edu
*** PLEASE post questions in newsgroups, not directly to me ***
I am having this problem with BT as we speak.
I have a mail server called alesi.projecthugo.co.uk set to a BT IP address
When you do a reverse look up on my ip address of 126.96.36.199 you get BT's
I've checked on RIPE and my IP block is assigned to me, and marked as static
IP address range, however because of this PTR issue it resolves to
host81-138-64-233.in-addr.btopenworld.com which registers as a dynamic
domain - therefore I see this message from certain hosts
From: MAILER-DAEMON at alesi.projecthugo.co.uk
[mailto:MAILER-DAEMON at alesi.projecthugo.co.uk]
Sent: 11 June 2005 05:31
To: helen at eventy.co.uk
Subject: failure notice
Hi. This is the qmail-send program at alesi.projecthugo.co.uk.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<mail at ukyouthparliament.org.uk>:
Connected to 188.8.131.52 but greeting failed.
Remote host said: 550 RBL rejection: direct deliveries from this
dynamic/dialup ip refused, use your ISP's smarthost.
I'm not going to try again; this message has been in the queue too long.
I've found that if you mail abuse at btopenworld.com you can request they
change DNS PTR to you dns hosts.
I'm currently in the process of trying this.
Try your self, let me know how you get on.
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