MX record for subdomain

Hello All,

I am having issues getting an mx record for a subdomain working properly. I
am hosting my external DNS on a 2003 server.

My root domain works properly. There are MX records for it that direct to a
third party spam filter. There is also an A record for mail which points to
the external IP of the mail server - this is the location where I want my
subdomain mail to go.

In the root domain DNS folder, I added another MX record for my subdomain,
sub and pointed it to mail.root.com.

When I try to resolve sub.root.com, it comes back with no IP but the list
will show an MX entry for mail.root.com plus the root domain info but doesn't
show the A record for mail.root.com. If I try to resolve mail.root.com, it
comes back properly with the ip and the associated root domain info but not
the mx record for sub.root.com.

Can someone please provide some insight as to where I am going wrong here?

Thanks in advance!!!

"da crusher" <> wrote in message news:99825235-CC60-4A47-AC2F-...
> Hello All,
>
> I am having issues getting an mx record for a subdomain working properly. I
> am hosting my external DNS on a 2003 server.
>
> My root domain works properly. There are MX records for it that direct to a
> third party spam filter. There is also an A record for mail which points to
> the external IP of the mail server - this is the location where I want my
> subdomain mail to go.
>
> In the root domain DNS folder, I added another MX record for my subdomain,
> sub and pointed it to mail.root.com.
>
> When I try to resolve sub.root.com, it comes back with no IP but the list
> will show an MX entry for mail.root.com plus the root domain info but doesn't
> show the A record for mail.root.com. If I try to resolve mail.root.com, it
> comes back properly with the ip and the associated root domain info but not
> the mx record for sub.root.com.
>
> Can someone please provide some insight as to where I am going wrong here?
>
> Thanks in advance!!!


Have you tried creating the MX record under the child domain? Just create an MX, leave the hostname blank, and point it to mail.root.com, if that is where you want it to go to.

--
Ace

This posting is provided "AS-IS" with no warranties or guarantees and confers no rights.

Please reply back to the newsgroup or forum for collaboration benefit among responding engineers, and to help others benefit from your resolution.

Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services

If you feel this is an urgent issue and require immediate assistance, please contact Microsoft PSS directly. Please check http://support.microsoft.com for regional support phone numbers.

Thanks for the quick response. I am testing this now.

"Ace Fekay [MVP-DS, MCT]" wrote:

> "da crusher" <> wrote in message news:99825235-CC60-4A47-AC2F-...
> > Hello All,
> >
> > I am having issues getting an mx record for a subdomain working properly. I
> > am hosting my external DNS on a 2003 server.
> >
> > My root domain works properly. There are MX records for it that direct to a
> > third party spam filter. There is also an A record for mail which points to
> > the external IP of the mail server - this is the location where I want my
> > subdomain mail to go.
> >
> > In the root domain DNS folder, I added another MX record for my subdomain,
> > sub and pointed it to mail.root.com.
> >
> > When I try to resolve sub.root.com, it comes back with no IP but the list
> > will show an MX entry for mail.root.com plus the root domain info but doesn't
> > show the A record for mail.root.com. If I try to resolve mail.root.com, it
> > comes back properly with the ip and the associated root domain info but not
> > the mx record for sub.root.com.
> >
> > Can someone please provide some insight as to where I am going wrong here?
> >
> > Thanks in advance!!!
>
>
> Have you tried creating the MX record under the child domain? Just create an MX, leave the hostname blank, and point it to mail.root.com, if that is where you want it to go to.
>
> --
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and confers no rights.
>
> Please reply back to the newsgroup or forum for collaboration benefit among responding engineers, and to help others benefit from your resolution.
>
> Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
> Microsoft Certified Trainer
> Microsoft MVP - Directory Services
>
> If you feel this is an urgent issue and require immediate assistance, please contact Microsoft PSS directly. Please check http://support.microsoft.com for regional support phone numbers.
> .
>

Unfortunately, this did not work. It appears that it resolves the same way.
sub.root.com will show the MX pointing to mail.root.com but no IP is returned
and mail.root.com A record does not show up in the list.

"Ace Fekay [MVP-DS, MCT]" wrote:

> "da crusher" <> wrote in message news:99825235-CC60-4A47-AC2F-...
> > Hello All,
> >
> > I am having issues getting an mx record for a subdomain working properly. I
> > am hosting my external DNS on a 2003 server.
> >
> > My root domain works properly. There are MX records for it that direct to a
> > third party spam filter. There is also an A record for mail which points to
> > the external IP of the mail server - this is the location where I want my
> > subdomain mail to go.
> >
> > In the root domain DNS folder, I added another MX record for my subdomain,
> > sub and pointed it to mail.root.com.
> >
> > When I try to resolve sub.root.com, it comes back with no IP but the list
> > will show an MX entry for mail.root.com plus the root domain info but doesn't
> > show the A record for mail.root.com. If I try to resolve mail.root.com, it
> > comes back properly with the ip and the associated root domain info but not
> > the mx record for sub.root.com.
> >
> > Can someone please provide some insight as to where I am going wrong here?
> >
> > Thanks in advance!!!
>
>
> Have you tried creating the MX record under the child domain? Just create an MX, leave the hostname blank, and point it to mail.root.com, if that is where you want it to go to.
>
> --
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and confers no rights.
>
> Please reply back to the newsgroup or forum for collaboration benefit among responding engineers, and to help others benefit from your resolution.
>
> Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA 2003/2000, MCSA Messaging 2003
> Microsoft Certified Trainer
> Microsoft MVP - Directory Services
>
> If you feel this is an urgent issue and require immediate assistance, please contact Microsoft PSS directly. Please check http://support.microsoft.com for regional support phone numbers.
> .
>

"da crusher" <> wrote in message news:B2ACAC9D-B671-4931-AB6E-...
> Unfortunately, this did not work. It appears that it resolves the same way.
> sub.root.com will show the MX pointing to mail.root.com but no IP is returned
> and mail.root.com A record does not show up in the list.


Show me how you are testing this. Please show whatever tool you are using and the results.

Ace

I am using domainwhitepages to confirm...here is the output (modified names,
ip's)
I also use nslookup from another mail server to try to resolve as well.

The bottom MX records are the third party spam filter

sub.root.com IN MX 3494s (00:58:14)
preference: 10
exchange: mail.root.com

root.com IN A xx.xx.xx.xx 3600s (01:00:00)
root.com IN NS ns1.root.com 3600s (01:00:00)
root.com IN NS ns2.root.com 3600s (01:00:00)
root.com IN SOA
server: ns1.root.com 3600s (01:00:00)
email: admin
serial: 5000
refresh: 900
retry: 600
expire: 86400
minimum ttl: 3600

root.com IN MX 3600s (01:00:00)
preference: 10
exchange: root.com.s5a1.psmtp.com

root.com IN MX 3600s (01:00:00)
preference: 20
exchange: root.com.s5a2.psmtp.com

root.com IN MX 3600s (01:00:00)
preference: 30
exchange: root.com.s5b1.psmtp.com

root.com IN MX 3600s (01:00:00)
preference: 40
exchange: root.com.s5b2.psmtp.com


"Ace Fekay [MVP-DS, MCT]" wrote:

> "da crusher" <> wrote in message news:B2ACAC9D-B671-4931-AB6E-...
> > Unfortunately, this did not work. It appears that it resolves the same way.
> > sub.root.com will show the MX pointing to mail.root.com but no IP is returned
> > and mail.root.com A record does not show up in the list.
>
>
> Show me how you are testing this. Please show whatever tool you are using and the results.
>
> Ace
> .
>

"da crusher" <> wrote in message news:C32821BE-78B1-46CB-9378-...
>I am using domainwhitepages to confirm...here is the output (modified names,
> ip's)
> I also use nslookup from another mail server to try to resolve as well.
>
> The bottom MX records are the third party spam filter
>
> sub.root.com IN MX 3494s (00:58:14)
> preference: 10
> exchange: mail.root.com
>
> root.com IN A xx.xx.xx.xx 3600s (01:00:00)
> root.com IN NS ns1.root.com 3600s (01:00:00)
> root.com IN NS ns2.root.com 3600s (01:00:00)
> root.com IN SOA
> server: ns1.root.com 3600s (01:00:00)
> email: admin
> serial: 5000
> refresh: 900
> retry: 600
> expire: 86400
> minimum ttl: 3600
>
> root.com IN MX 3600s (01:00:00)
> preference: 10
> exchange: root.com.s5a1.psmtp.com
>
> root.com IN MX 3600s (01:00:00)
> preference: 20
> exchange: root.com.s5a2.psmtp.com
>
> root.com IN MX 3600s (01:00:00)
> preference: 30
> exchange: root.com.s5b1.psmtp.com
>
> root.com IN MX 3600s (01:00:00)
> preference: 40
> exchange: root.com.s5b2.psmtp.com
>

Well, what appears is that if you did create an MX record under sub.root.com that points to mail.root.com, then it is correct. If you want it to point to something else, such as mail.sub.root.com, then you have to create a 'mail' A record under sub.root.com, then in the MX record, point it to mail.sub.root.com.

Otherwise, I don't see a problem with the results. Also, as far as I see, you are using Postini, evident with the 'psmtp.com' domain. If you want it to point to a sub domain record, such as I mentioned above (mail.sub.root.com), then you need to confer with the Postini support to make it happen, since as far as I remember with Postini, they create the records, not you, under their pstmp.com zone, since it belongs to them.

And keep in mind, this is all using examples based on obsficating the name.

Have you spoken with Postini support regarding your intentions? If so, what did they advise?

Ace