XADM: How to Eliminate DNS's MX records with Multiple Sites (152503)
The information in this article applies to:
- Microsoft Exchange Server 4.0
This article was previously published under Q152503 SUMMARY
The MX record on DNS server is used to map a Fully Qualified Domain Name
(FQDN) to a specific Microsoft Exchange Site or Host. This record can be
eliminated if you do not want to use MX records on your DNS server. It can
be done by changing the Microsoft Exchange Site Address to match the FQDN
("A" record) on your DNS server.
MORE INFORMATION
You can change this in the Microsoft Exchange Administrator program on the
Site Addressing tab of the Site Addressing Property Page. When you are
prompted to change the Mailbox address, reply yes so that all user SMTP e-
mail addresses match the Site SMTP address. This must be done to all
Microsoft Exchange Sites within the Organization.
The drawback to this type of configuration is that no two SMTP addresses
can be the same within an Organization. Microsoft Exchange will keep this
from happening on new mailbox creations if Directory Replication has
happened between every Site in the Organization, and providing that no two
instances of the Microsoft Exchange Administrator program are creating the
same SMTP address at the same time.
For faster name resolution, it is common to have an MX defined, even if the
A record is the same. This information is from the Microsoft Exchange
Concepts and Planning Guide, page 46.
| Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
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| Keywords: | kbhowto kbusage KB152503 |
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