Apple Mac OS X Server (Administrator’s Guide) - Manual (Page 396)

396 Chapter 9
The cleanup operation takes place without any feedback. During cleanup, a number of
messages are written in the mail service repair log, which you can view by using Server
Status. The cleanup operation is finished when another command-line prompt appears.
4 In Server Settings, start mail service.
Working With Network Settings for Mail Service
You can change the following network settings of your mail service:
m which DNS records mail service uses to look up a mail server
m when mail service updates its DNS cache
m when mail service connections time out
This section describes how to change these settings.
Specifying DNS Lookup for Mail Service
You can specify the type of DNS records you want your mail service to use when it looks up
the server for an address of an outgoing message, such as [email protected]. Your mail
service can look up another server by requesting
m Only an MX list. An MX List consists of one or more MX records for an Internet domain.
An MX record matches a domain name, such as example.com, with the full DNS name of a
mail server, such as mail.example.com. Some domains have more than one mail server,
each with an MX record. In this case, the MX records specify priorities for the mail
servers. Some mail servers don’t have any MX records.
m Only an A record. An A record matches a full DNS name (also known as a host name),
such as mail.example.com, to an IP address.
m An MX list and an A record. By default, your mail service requests MX records. If none
exists, the mail service requests an A record.
To specify the type of DNS records your mail service requests:
1 In Server Settings, click the Internet tab.
2 Click Mail Service and choose Configure Host Settings.
3 Click the Network Settings tab.
4 Select one of the settings for DNS Request, then click Save.