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Exchange DNS setup

By courtney ·
I have a Exchange server at 66.7.x.x. I had my ISP do the the DNS and they had an MX record pointing to the external IP address of my ISA server. It was working fine. Now I have moved the domain and DNS to the host of my domain and I am trying to make the same DNS MX records, but it doesnt seem to work. I can send mail from the network, but I can't recieve anything, which makes me think it is the DNS setup. This is how the DNS is setup:

hostname: mail--- record type: MXE ---IP is 66.7.X.X. (IP of ISA server)

hostname: mail ----record type: A ---IP is (same as above)

Does this look correct? Do I need a A record and an MX record? I am not sure if it is DNS or not.

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by Darlington In reply to Exchange DNS setup

I had similar problem few months ago, the difference is that you have ISA, I have SONICWall Firewal, but in any case your config looks fine, but just make sure that:

1) Your ISP is stil maintaining the MX record that pojnts to your Mailserver, may be you should verify that with the.

2) Creating an A and MX records in the internal DNS server for the same Mail server should solve your problem too, especially when you are able to send outgoing mails.

3) Your config seems fine but what you are having is DNS problem and you should check your DNS configs carefully and there would be smile.

Let me know what happens later.

Darlington@Dartgh.com

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by courtney In reply to

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by CG IT In reply to Exchange DNS setup

I believe that you have to register your Name server with your ISP as authoritative for your Domain name. If there is no authoritative name server listed for your domain name, e.g. your DNS server isn't listed as authoritative and registered with your ISP [which means DNS updates never gets to your ISP] AND listed as authoritative with your domain name registrar, an internet wide "whois" request [IP address request] for your domain name will go unanswered. Therefore, inbound email won't find you.

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by courtney In reply to

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by courtney In reply to Exchange DNS setup

SO it looks like my DNS is setup correctly. Read below for my follow up question. Hopefully you guys can help.....

I am able to send email but not receive it. When I go to www.checkdns.net and do a test for my domain crestpsi.com. It says email is working fine. But when I open up users Outlook it doesnt receive mail and I get delivery messegaes returned after a couple of hours if I try to send these internal users email.

It was all working fine when I had my ISP do the DNS. Now I am doing it and it seems like it is fine, from the tests.

What should I look at for the problems?

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by courtney In reply to Exchange DNS setup

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