Problem accessing e-mail hosted by ISP using internal DNS

August 14, 2007

I have kind of an interesting problem. I have set up a Windows 2003

SP2 standard server with Active Directory and DNS. I don't host an e-

mail server and instead use external e-mail provided by my ISP. My

internal domain name is the same as my registered domain name. So my

internal domain would be mydomain.com and my registered domain name is

also mydomain.com. The problem is my ISP requires me to check my e-

mail by going to http://mydomain.com/email. Of course if I try to go

to this address my internal DNS resolves the name and returns an

error. If I change my local machine to point to my ISP's DNS servers

instead of my internal DNS server everything works okay as expected.

I have discovered that I can also access my email from http://mail.mydomain.com/email.

I tried adding an A record into my DNS server pointing

mail.mydomain.com to the external IP address of my ISP's mail server

but for some reason this doesn't work. I have pinged

mail.mydomain.com and it returns the correct external IP address (when

using my internal server with an A record). I have even tried

accessing the external server directly by IP such as http://192.168.1.1/email.

For some reason as long as I am using my internal DNS server this just

won't work. When I change to my providers DNS server all of the above

work just fine. Any ideas? Oh, I have also set up forwarders in my

DNS server so I have no trouble accessing any other websites. Thank

you.

August 14, 2007

Re: Problem accessing e-mail hosted by ISP using internal DNS

Oracle,

You are already on the right track. You just need to set up a record in your

internal DNS with the external IP address for mail.mydomain.com then access

it by http://mail.mydomain.com.

You should only use your internal DNS server, and set it to forward to the

ISP's. It sounds like you have this.

Then you need to flush the cache on the DNS server and on the client,

otherwise your testing is misleading. If you have done this and can ping the

mail server correctly, then your DNS is OK and you have a different problem.

Anthony -

http://www.airdesk.co.uk

<oracle8202@gmail.com> wrote in message

news:1187062770.537331.277360@q3g2000prf.googlegroups.com...

>I have kind of an interesting problem. I have set up a Windows 2003

> SP2 standard server with Active Directory and DNS. I don't host an e-

> mail server and instead use external e-mail provided by my ISP. My

> internal domain name is the same as my registered domain name. So my

> internal domain would be mydomain.com and my registered domain name is

> also mydomain.com. The problem is my ISP requires me to check my e-

> mail by going to http://mydomain.com/email. Of course if I try to go

> to this address my internal DNS resolves the name and returns an

> error. If I change my local machine to point to my ISP's DNS servers

> instead of my internal DNS server everything works okay as expected.

> I have discovered that I can also access my email from

> http://mail.mydomain.com/email.

> I tried adding an A record into my DNS server pointing

> mail.mydomain.com to the external IP address of my ISP's mail server

> but for some reason this doesn't work. I have pinged

> mail.mydomain.com and it returns the correct external IP address (when

> using my internal server with an A record). I have even tried

> accessing the external server directly by IP such as

> http://192.168.1.1/email.

> For some reason as long as I am using my internal DNS server this just

> won't work. When I change to my providers DNS server all of the above

> work just fine. Any ideas? Oh, I have also set up forwarders in my

> DNS server so I have no trouble accessing any other websites. Thank

> you.

>

August 14, 2007

Re: Problem accessing e-mail hosted by ISP using internal DNS

I kind of thought I was doing everything correctly. I tried

flushing the DNS cache on the server and client but that didn't seem

to do the trick. The thing I found weird was that I couldn't even

access the site using the IP address when I used the internal DNS

server so I figured it couldn't be solely a DNS problem. I noticed

when I typed http://mail.mydomain.com/email using the provider DNS

that the site redirected to http://mydomain.com/email. This doesn't

happen when I use the internal DNS but I assume something like that is

going on in the background. When using IE7 it just displays a page

cannot be displayed error. If I try in Navigator I get a mydomain.com

denied access error. So... what I think is happening is that the site

is redirecting from mail.mydomain.com to mydomain.com and my internal

DNS server is then trying to resolve mydomain.com and since I don't

have a web server (or port 80) open on that server it is just

failing. What do you think? Sound plausible?

On Aug 14, 2:09 am, "Anthony" <anthony.s...@spammedout.com> wrote:

> Oracle,

> You are already on the right track. You just need to set up a record in your

> internal DNS with the external IP address for mail.mydomain.com then access

> it byhttp://mail.mydomain.com.

> You should only use your internal DNS server, and set it to forward to the

> ISP's. It sounds like you have this.

> Then you need to flush the cache on the DNS server and on the client,

> otherwise your testing is misleading. If you have done this and can ping the

> mail server correctly, then your DNS is OK and you have a different problem.

> Anthony -http://www.airdesk.co.uk

>

> <oracle8...@gmail.com> wrote in message

>

> news:1187062770.537331.277360@q3g2000prf.googlegroups.com...

>

> >I have kind of an interesting problem. I have set up a Windows 2003

> > SP2 standard server with Active Directory and DNS. I don't host an e-

> > mail server and instead use external e-mail provided by my ISP. My

> > internal domain name is the same as my registered domain name. So my

> > internal domain would be mydomain.com and my registered domain name is

> > also mydomain.com. The problem is my ISP requires me to check my e-

> > mail by going tohttp://mydomain.com/email. Of course if I try to go

> > to this address my internal DNS resolves the name and returns an

> > error. If I change my local machine to point to my ISP's DNS servers

> > instead of my internal DNS server everything works okay as expected.

> > I have discovered that I can also access my email from

> >http://mail.mydomain.com/email.

> > I tried adding an A record into my DNS server pointing

> > mail.mydomain.com to the external IP address of my ISP's mail server

> > but for some reason this doesn't work. I have pinged

> > mail.mydomain.com and it returns the correct external IP address (when

> > using my internal server with an A record). I have even tried

> > accessing the external server directly by IP such as

> >http://192.168.1.1/email.

> > For some reason as long as I am using my internal DNS server this just

> > won't work. When I change to my providers DNS server all of the above

> > work just fine. Any ideas? Oh, I have also set up forwarders in my

> > DNS server so I have no trouble accessing any other websites. Thank

> > you.- Hide quoted text -

>

> - Show quoted text -

August 15, 2007

Re: Problem accessing e-mail hosted by ISP using internal DNS

You are right, that's exactly the problem. You should be able to ask them to

change it. They are running the external DNS for your zone so it should be

easy enough for them to do it,

Hope that helps,

Anthony -

http://www.airdesk.co.uk

<oracle8202@gmail.com> wrote in message

news:1187135832.015128.151570@g12g2000prg.googlegroups.com...

> I kind of thought I was doing everything correctly. I tried

> flushing the DNS cache on the server and client but that didn't seem

> to do the trick. The thing I found weird was that I couldn't even

> access the site using the IP address when I used the internal DNS

> server so I figured it couldn't be solely a DNS problem. I noticed

> when I typed http://mail.mydomain.com/email using the provider DNS

> that the site redirected to http://mydomain.com/email. This doesn't

> happen when I use the internal DNS but I assume something like that is

> going on in the background. When using IE7 it just displays a page

> cannot be displayed error. If I try in Navigator I get a mydomain.com

> denied access error. So... what I think is happening is that the site

> is redirecting from mail.mydomain.com to mydomain.com and my internal

> DNS server is then trying to resolve mydomain.com and since I don't

> have a web server (or port 80) open on that server it is just

> failing. What do you think? Sound plausible?

>

> On Aug 14, 2:09 am, "Anthony" <anthony.s...@spammedout.com> wrote:

>> Oracle,

>> You are already on the right track. You just need to set up a record in

>> your

>> internal DNS with the external IP address for mail.mydomain.com then

>> access

>> it byhttp://mail.mydomain.com.

>> You should only use your internal DNS server, and set it to forward to

>> the

>> ISP's. It sounds like you have this.

>> Then you need to flush the cache on the DNS server and on the client,

>> otherwise your testing is misleading. If you have done this and can ping

>> the

>> mail server correctly, then your DNS is OK and you have a different

>> problem.

>> Anthony -http://www.airdesk.co.uk

>>

>> <oracle8...@gmail.com> wrote in message

>>

>> news:1187062770.537331.277360@q3g2000prf.googlegroups.com...

>>

>> >I have kind of an interesting problem. I have set up a Windows 2003

>> > SP2 standard server with Active Directory and DNS. I don't host an e-

>> > mail server and instead use external e-mail provided by my ISP. My

>> > internal domain name is the same as my registered domain name. So my

>> > internal domain would be mydomain.com and my registered domain name is

>> > also mydomain.com. The problem is my ISP requires me to check my e-

>> > mail by going tohttp://mydomain.com/email. Of course if I try to go

>> > to this address my internal DNS resolves the name and returns an

>> > error. If I change my local machine to point to my ISP's DNS servers

>> > instead of my internal DNS server everything works okay as expected.

>> > I have discovered that I can also access my email from

>> >http://mail.mydomain.com/email.

>> > I tried adding an A record into my DNS server pointing

>> > mail.mydomain.com to the external IP address of my ISP's mail server

>> > but for some reason this doesn't work. I have pinged

>> > mail.mydomain.com and it returns the correct external IP address (when

>> > using my internal server with an A record). I have even tried

>> > accessing the external server directly by IP such as

>> >http://192.168.1.1/email.

>> > For some reason as long as I am using my internal DNS server this just

>> > won't work. When I change to my providers DNS server all of the above

>> > work just fine. Any ideas? Oh, I have also set up forwarders in my

>> > DNS server so I have no trouble accessing any other websites. Thank

>> > you.- Hide quoted text -

>>

>> - Show quoted text -

>

August 18, 2007

Re: Problem accessing e-mail hosted by ISP using internal DNS

Thanks for your help Anthony I appreciate it. I'll contact my ISP and

get it changed.

On Aug 15, 2:08 am, "Anthony" <anthony.s...@spammedout.com> wrote:

> You are right, that's exactly the problem. You should be able to ask them to

> change it. They are running the external DNS for your zone so it should be

> easy enough for them to do it,

> Hope that helps,

> Anthony -http://www.airdesk.co.uk

>

> <oracle8...@gmail.com> wrote in message

>

> news:1187135832.015128.151570@g12g2000prg.googlegroups.com...

>

> > I kind of thought I was doing everything correctly. I tried

> > flushing the DNS cache on the server and client but that didn't seem

> > to do the trick. The thing I found weird was that I couldn't even

> > access the site using the IP address when I used the internal DNS

> > server so I figured it couldn't be solely a DNS problem. I noticed

> > when I typedhttp://mail.mydomain.com/emailusing the provider DNS

> > that the site redirected tohttp://mydomain.com/email. This doesn't

> > happen when I use the internal DNS but I assume something like that is

> > going on in the background. When using IE7 it just displays a page

> > cannot be displayed error. If I try in Navigator I get a mydomain.com

> > denied access error. So... what I think is happening is that the site

> > is redirecting from mail.mydomain.com to mydomain.com and my internal

> > DNS server is then trying to resolve mydomain.com and since I don't

> > have a web server (or port 80) open on that server it is just

> > failing. What do you think? Sound plausible?

>

> > On Aug 14, 2:09 am, "Anthony" <anthony.s...@spammedout.com> wrote:

> >> Oracle,

> >> You are already on the right track. You just need to set up a record in

> >> your

> >> internal DNS with the external IP address for mail.mydomain.com then

> >> access

> >> it byhttp://mail.mydomain.com.

> >> You should only use your internal DNS server, and set it to forward to

> >> the

> >> ISP's. It sounds like you have this.

> >> Then you need to flush the cache on the DNS server and on the client,

> >> otherwise your testing is misleading. If you have done this and can ping

> >> the

> >> mail server correctly, then your DNS is OK and you have a different

> >> problem.

> >> Anthony -http://www.airdesk.co.uk

>

> >> <oracle8...@gmail.com> wrote in message

>

> >>news:1187062770.537331.277360@q3g2000prf.googlegroups.com...

>

> >> >I have kind of an interesting problem. I have set up a Windows 2003

> >> > SP2 standard server with Active Directory and DNS. I don't host an e-

> >> > mail server and instead use external e-mail provided by my ISP. My

> >> > internal domain name is the same as my registered domain name. So my

> >> > internal domain would be mydomain.com and my registered domain name is

> >> > also mydomain.com. The problem is my ISP requires me to check my e-

> >> > mail by going tohttp://mydomain.com/email. Of course if I try to go

> >> > to this address my internal DNS resolves the name and returns an

> >> > error. If I change my local machine to point to my ISP's DNS servers

> >> > instead of my internal DNS server everything works okay as expected.

> >> > I have discovered that I can also access my email from

> >> >http://mail.mydomain.com/email.

> >> > I tried adding an A record into my DNS server pointing

> >> > mail.mydomain.com to the external IP address of my ISP's mail server

> >> > but for some reason this doesn't work. I have pinged

> >> > mail.mydomain.com and it returns the correct external IP address (when

> >> > using my internal server with an A record). I have even tried

> >> > accessing the external server directly by IP such as

> >> >http://192.168.1.1/email.

> >> > For some reason as long as I am using my internal DNS server this just

> >> > won't work. When I change to my providers DNS server all of the above

> >> > work just fine. Any ideas? Oh, I have also set up forwarders in my

> >> > DNS server so I have no trouble accessing any other websites. Thank

> >> > you.- Hide quoted text -

>

> >> - Show quoted text -- Hide quoted text -

>

> - Show quoted text -

August 18, 2007

Re: Problem accessing e-mail hosted by ISP using internal DNS

Good luck with it,

Anthony

<oracle8202@gmail.com> wrote in message

news:1187399988.063356.167500@x35g2000prf.googlegroups.com...

> Thanks for your help Anthony I appreciate it. I'll contact my ISP and

> get it changed.

>

> On Aug 15, 2:08 am, "Anthony" <anthony.s...@spammedout.com> wrote:

>> You are right, that's exactly the problem. You should be able to ask them

>> to

>> change it. They are running the external DNS for your zone so it should

>> be

>> easy enough for them to do it,

>> Hope that helps,

>> Anthony -http://www.airdesk.co.uk

>>

>> <oracle8...@gmail.com> wrote in message

>>

>> news:1187135832.015128.151570@g12g2000prg.googlegroups.com...

>>

>> > I kind of thought I was doing everything correctly. I tried

>> > flushing the DNS cache on the server and client but that didn't seem

>> > to do the trick. The thing I found weird was that I couldn't even

>> > access the site using the IP address when I used the internal DNS

>> > server so I figured it couldn't be solely a DNS problem. I noticed

>> > when I typedhttp://mail.mydomain.com/emailusing the provider DNS

>> > that the site redirected tohttp://mydomain.com/email. This doesn't

>> > happen when I use the internal DNS but I assume something like that is

>> > going on in the background. When using IE7 it just displays a page

>> > cannot be displayed error. If I try in Navigator I get a mydomain.com

>> > denied access error. So... what I think is happening is that the site

>> > is redirecting from mail.mydomain.com to mydomain.com and my internal

>> > DNS server is then trying to resolve mydomain.com and since I don't

>> > have a web server (or port 80) open on that server it is just

>> > failing. What do you think? Sound plausible?

>>

>> > On Aug 14, 2:09 am, "Anthony" <anthony.s...@spammedout.com> wrote:

>> >> Oracle,

>> >> You are already on the right track. You just need to set up a record

>> >> in

>> >> your

>> >> internal DNS with the external IP address for mail.mydomain.com then

>> >> access

>> >> it byhttp://mail.mydomain.com.

>> >> You should only use your internal DNS server, and set it to forward to

>> >> the

>> >> ISP's. It sounds like you have this.

>> >> Then you need to flush the cache on the DNS server and on the client,

>> >> otherwise your testing is misleading. If you have done this and can

>> >> ping

>> >> the

>> >> mail server correctly, then your DNS is OK and you have a different

>> >> problem.

>> >> Anthony -http://www.airdesk.co.uk

>>

>> >> <oracle8...@gmail.com> wrote in message

>>

>> >>news:1187062770.537331.277360@q3g2000prf.googlegroups.com...

>>

>> >> >I have kind of an interesting problem. I have set up a Windows 2003

>> >> > SP2 standard server with Active Directory and DNS. I don't host an

>> >> > e-

>> >> > mail server and instead use external e-mail provided by my ISP. My

>> >> > internal domain name is the same as my registered domain name. So

>> >> > my

>> >> > internal domain would be mydomain.com and my registered domain name

>> >> > is

>> >> > also mydomain.com. The problem is my ISP requires me to check my e-

>> >> > mail by going tohttp://mydomain.com/email. Of course if I try to go

>> >> > to this address my internal DNS resolves the name and returns an

>> >> > error. If I change my local machine to point to my ISP's DNS

>> >> > servers

>> >> > instead of my internal DNS server everything works okay as expected.

>> >> > I have discovered that I can also access my email from

>> >> >http://mail.mydomain.com/email.

>> >> > I tried adding an A record into my DNS server pointing

>> >> > mail.mydomain.com to the external IP address of my ISP's mail server

>> >> > but for some reason this doesn't work. I have pinged

>> >> > mail.mydomain.com and it returns the correct external IP address

>> >> > (when

>> >> > using my internal server with an A record). I have even tried

>> >> > accessing the external server directly by IP such as

>> >> >http://192.168.1.1/email.

>> >> > For some reason as long as I am using my internal DNS server this

>> >> > just

>> >> > won't work. When I change to my providers DNS server all of the

>> >> > above

>> >> > work just fine. Any ideas? Oh, I have also set up forwarders in my

>> >> > DNS server so I have no trouble accessing any other websites. Thank

>> >> > you.- Hide quoted text -

>>

>> >> - Show quoted text -- Hide quoted text -

>>

>> - Show quoted text -

>

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