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Exchange 2000, internally, unlike traditional SMTP mail servers, does not rely on DNS MX records for mail delivery within the organisation. Instead, it maintains a dynamic routing table used to transport mail around the Exchange organisation. However, Exchange 2000 does depend on DNS for resolving host names, finding global catalog servers and finding other mail servers on the Internet.
Also, without MX records on Internet DNSs, you wouldn't get mail from the Internet into your corporate environment.
Exchange 2000 relies heavily on global catalog servers for basic routines such directory lookups. Special entries in the Windows 2000 DNS called SRV tell Exchange 2000 where to locate global catalog servers.
You don't have to worry about creating these records seeing that they are created automatically using dynamic registration. Like all Windows 2000 machines, Exchange 2000 server should have their DNS client point to a Windows 2000 DNS server. Following is an example of an IP configuration of an Exchange server:
Connection-specific DNS Suffix...........test.labNote that the DNS client points to an internet DNS. However, Exchange 2000 needs to send mail to the Internet. For that, internal records might not be enough.
Description........................................3Com 3C905TX-based
Physical Address..............................00-60-08-53-AA-EC
Dhcp Enabled....................................No
IP Address........................................192.168.0.5
Subnet Mask.....................................255.255.255.0
Default Gateway................................192.168.0.254
DNS Servers.....................................192.168.0.1
192.168.0.2 Primary WINS Server.........................192.168.0.1
The information in this article applies to:
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