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Author DNS question... (New Boy...)
Colin A

2002-11-28, 11:23 am

Hi

We have an Exchange 2000 up and running...., and we can send a receive emails with out problem....

My problem is that we are getting some emails bounced back because the remote site is using reverse DNS lookup...

For instance, I think my emails go out with username@mydomain.co.uk but what they are really going out with is username@mailserver.localdomain.mydomain.co.uk, the remote site does a reverse DNS lookup and finds that this "mailserver.localdomain.mydomain.co.uk" doesn't exist so I get bounced....

Not really sure what to change in Exchange to get this working.... Would I need to register the "local domain name" with our ISP...?

Thank in advance....

Colin
John Oliver, Jr. \(MVP\)

2002-11-28, 7:23 pm

Yes, you will need to register a DNS reverse lookup record for your domain but this has its caveats. As you have experienced first hand, a lot of email will be rejected by doing this.

--
John Oliver, Jr.
MCSE, MCT, CCNA, Exchange MVP
"Colin A" <colin.albright@XXXXvaluelink.co.uk> wrote in message news:3de64fd9$0$711$ed9e5944@r
eading.news.pipex.net...
Hi

We have an Exchange 2000 up and running...., and we can send a receive emails with out problem....

My problem is that we are getting some emails bounced back because the remote site is using reverse DNS lookup...

For instance, I think my emails go out with username@mydomain.co.uk but what they are really going out with is username@mailserver.localdomain.mydomain.co.uk, the remote site does a reverse DNS lookup and finds that this "mailserver.localdomain.mydomain.co.uk" doesn't exist so I get bounced....

Not really sure what to change in Exchange to get this working.... Would I need to register the "local domain name" with our ISP...?

Thank in advance....

Colin

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