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smtp server

Hi,
we are using a smtp server for our exchange 2003.
the smtp server is on another server.
does the smtp server need a dns server, because on our smtp server also a dns server is installed.
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Eprs_Admin
Asked:
Eprs_Admin
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1 Solution
 
Chris DentPowerShell DeveloperCommented:

It needs to be able to talk to a DNS server to find remote domains MX records to send out mail. It does not need to be a DNS server itself.

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
so you mean its not necessary to have an extra dns on the smtp server.
where is it configured, on the smtp itself ?
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bmatumburaCommented:
Configure the DNS settings on your network interface's TCP/IP settings... or on your DHCP server you are not using static IP Addresses on the server.
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Chris DentPowerShell DeveloperCommented:

Your SMTP Server doesn't have to run the SMTP service. The only requirement is that it's able to talk to DNS to resolve names if it's sending out mail, however, the DNS server it uses can be elsewhere.

For the most part an SMTP Server uses the same DNS servers as the server (those seen in "ipconfig /all"). IIS SMTP certainly will. MS Exchange allows you to configure alternative DNS servers for the SMTP service, although it's not really a setting I would recommend, adds a bit too much obscurity.

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
ok, I have seen on my smtp server, there are some domains created and all emails shall be transfered to the exchange server directly. But for me its not sure, for what do I have this dn server on the smtp server?
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Chris DentPowerShell DeveloperCommented:

What are you using the SMTP server for?

SMTP isn't the only service that might benefit from having DNS available, it does depend on what the server is doing, and on the environment it's operating in.

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
the smtp server is relaying our emails from exchange.
exchange server is srv2 and the smtp is srv4

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Eprs_AdminSystem ArchitectAuthor Commented:
the first dns on srv1 is active directory integrated.
the dns on srv4 is secondary.

But why the settings on both dns are different ?
is it normal ? on sec dns are other zones created than on dns1.
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Chris DentPowerShell DeveloperCommented:

Because Active Directory zones will only replicate to Domain Controllers. If there is a need to host the zone elsewhere then it must be Secondary.

> on sec dns are other zones created than on dns1.

But presumably not without reason. I would imagine the SMTP server is using those to send mail. What do you have in those zones? MX Records?

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
Yes I have 1 mx record inside and 2 host a records called mail and www.
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Chris DentPowerShell DeveloperCommented:

I assume that's to help it deliver to your Exchange server. Do the MX records point to your Exchange server?

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
Not to my exchange server.
Its another doamin, and the mx record , the www and the mail record is in it.
Its not my domain.
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Chris DentPowerShell DeveloperCommented:

I guess whoever created it is no longer there? And that there's no documented reason for it to exist?

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
ok thanks so far.
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Chris DentPowerShell DeveloperCommented:

To be honest, unless you know why it's there, and the impact of changing it I suggest you leave it unless it's broken.

If you're happy to dig into why it's there then I'll happily help you break it :)

Chris
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Eprs_AdminSystem ArchitectAuthor Commented:
Thanks for help.
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