Re: Cannot send to Hotmail or MSN

Thanks James....I will forward my ISP the link....states things pretty clearly!

"james chong" wrote:

I can presume then that that your advice is based on the PTR
test I included?

Yes + from MSN's postmater FAQ.

We may not accept e-mail from senders who fail a reverse-DNS lookup.
http://postmaster.msn.com/Troubleshooting.aspx

James Chong




Christo wrote:
Thanks James. I can presume then that that your advice is based on the PTR
test I included? Is there another method that I can test this? My initial
thought is that my ISP will say they have this already set up or say they
don't need it so the more information I can present to them the easier my
case will be.

"james chong" wrote:

Please have your ISP enter your PTR records for your mail servers as
some orgs such as yahoo and AOL will rejects email from domains that do
not have this.

James Chong

Christo wrote:
Thanks again Andy. Our ISP hosts the DNS so everything we do goes from our
network to theirs and then out. As far as email sent to us...our ISP
collects it then we pop it from our desktops. Our domain is
county.peterborough.on.ca if you want to see the test results....I am not
sure there is room to paste the results here. The PTR test is below;

Reverse DNS entries for MX records ERROR: None of your mail server(s) seem
to have reverse DNS (PTR) entries (I didn't get any responses for them).
RFC1912 2.1 says you should have a reverse DNS for all your mail servers. It
is strongly urged that you have them, as many mailservers will not accept
mail from mailservers with no reverse DNS entry. You can double-check using
the 'Reverse DNS Lookup' tool at the DNSstuff site (it contacts your servers
in real time; the reverse DNS lookups in the DNS report use our local caching
DNS server).

I did the tests for our domain and it appears things could be configured
better at the ISP but some of this stuff is above my knowledge and currently
not mine to change.

I welcome further suggestions!!!!!

"Andy David - MVP" wrote:

On Fri, 24 Nov 2006 08:07:02 -0800, Christo
<Christo@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Thanks for the response Andy. Our ISP hosts the DNS for mail. Their routers
basically control our network. Because we run MS 2003 there is the 'internal'
dns but there are no records for anything outside my internal domain.

Then how do people send mail to you? :)
Check your domain here:
www.dnsreport.com

When you send mail to external domains, you either send it directly or
your smatrhost it to another server.
What you need to check is that the externally routable ip address of
the sending server has a PTR:
www.dnsstuff.com



"Andy David - MVP" wrote:

On Fri, 24 Nov 2006 07:48:01 -0800, Christo
<Christo@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

We currently host internal Exhange and POP/SMTP from Outlook 2003 desktop for
external/domain email. Our ISP hosts the domain side of things. We cannot
send to hotmail or msn domains...and a few other domains are
sketchy/intermittent. 95% of all our other email sends fine. When the email
gets returned I see an error similar to the following; (mail username has
been changed)

First thing to look at: Do you have a PTR record in DNS for your
sending mail server?


Reporting-MTA: dns;smtp.nexicom.net

Final-Recipient: rfc822;user@xxxxxxx
Action: delayed
Status: 4.4.7
Will-Retry-Until: Sat, 25 Nov 2006 16:04:02 -0500
X-Display-Name: user@xxxxxxx

It does eventually fail with; (yes this is different failed message than
above)

'user@xxxxxxxxxxx' on 11/23/2006 2:12 PM
Could not deliver the message in the time limit specified.
Please retry or contact your administrator.
<smtp.nexicom.net #4.4.7>

Our ISP says it is our Exchange server bouncing the messages as he see's this;

postmaster@xxxxxxxxxxxxxxxxx (names changed by me)

I have checked many KB's and can't come up with anything....like I said
above...hotmail and msn are the two causing the worst headache.

Thanks in advance.







.

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