Re: Can't receive mail from some domains

Thanks for that. I've taken it up with the ISP but do you think this could be
caused by a delay in the reverse DNS taking effect? Just curious.


"Lanwench [MVP - Exchange]" wrote:

In news:9C4B29A8-6476-447B-8406-237691DAFD32@xxxxxxxxxxxxx,
Dave G <DaveG@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
Hi Lanwench,

My ISP's primary and secondary nameservers as listed in dnsreport.com
are different to those I put in on my sbs box when running the ciecw.

That's fine...


They're also different to the DNS servers picked up automatically by
my adsl modem/router. Will this make a difference? If not what
questions should I ask them?

That shouldn't make a difference either. The issue is, or was, or is, with
your domain's DNS settings on the ISP/host's nameservers ....

I know for a fact that two of the domains which are unable to e-mail
us send their mail out through a smarthost who happens to be the same
ISP! One of them gets the 5.1.1 NDR and the other receives nothing
back at all. Both domains are sister companies and really need to
connect with us.

Help!

Thanks.

"Lanwench [MVP - Exchange]" wrote:

In news:F877707E-DAEA-412E-84E5-D3F0A1CE06F1@xxxxxxxxxxxxx,
Dave G <DaveG@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
Ah Lanwench, I was hoping you'd reply. I have a soft spot for you,
having browsed the forum from afar!

Say, that isn't you in the unmarked van across the street, is it? If
it is, would you mind picking up my shirts at the cleaners while I'm
at a client's office this afternoon?



Strange, when I ran dnsreport.com earlier today (and yesterday) it
reported no errors. The 2 errors it gives now, should they affect
delivery of mail to my server? I thought these were errors with the
ISP name servers? Can I do anything about this?

You should definitely contact the dudes who manage the nameservers &
your public DNS. There's clearly a problem, if you know your
firewall is configured properly and you can telnet on port 25 to
your public IP from the internet ....which I can do easily enough
right now.

Post back, and remember I asked for *light* starch on the blue one.


Thanks a lot.

"Lanwench [MVP - Exchange]" wrote:

In news:49DC65DF-373C-4C30-94D1-18D1C92D6E78@xxxxxxxxxxxxx,
Dave G <DaveG@xxxxxxxxxxxxxxxxxxxxxxxxx> typed:
Hi all, really hope you can help me with this one. Just completed
a standard SBS 2003 R2 installation using our own mail server and
DNS routing. The problem is that users can receive messages from
some domains but not others. Sending is fine. The problem domains
either receive a NDR or, in some cases, nothing at all. The NDR
is as follows: --------------------------------------------------
Reporting-MTA: dns;HESA03UKER.HE.LOCAL
Received-From-MTA: dns;C2bthimr10.btconnect.com
Arrival-Date: Fri, 27 Oct 2006 14:28:08 +0100

Final-Recipient: rfc822;cathyb@xxxxxxxxxxxxxxxx
Action: failed
Status: 5.1.1
----------------------------------------------------

The NDR comes from postmaster@xxxxxxxx - cathyb@xxxxxxxxxxxxxxxx
is a valid address and has been receiving external mail from other
domains.

I have set the A and MX records with my ISP and everything seems
to check out on dnsreport.com. The DNS records at my ISP are:

A mail 81.138.23.69 (my mailserver IP)
CNAME www home.btconnect.com
CNAME ftp home.btconnect.com
CNAME mail mail.btconnect.com
FRAME @ www.newcapital.co.uk
MX @ ibmr.btconnect.com
20 MX @ mail.newcapital.co.uk
10 (my mailserver)

I have had the ISP set up a reverse DNS entry for my mailserver. I
am using the IMF but have removed recipient filtering from AD.

Really not sure what the problem is (nothing in the event viewer
helps) but I had two initial thoughts. Should the secondary MX
record for btconnect.com be removed? Also, we were notified two
days ago that the reverse DNS request had been actioned but told
that it could take up to 5 days to be fully operational. Could
this be the problem?

Hmmm -

http://www.dnsreport.com/tools/dnsreport.ch?domain=newcapital.co.uk
reports some errors.


Any pointers from you good people would really be appreciated. Let
me know if you need any more info.

Many thanks!




.

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