
Chapter 1 Mail Service Setup 19
Configuring Incoming Mail Service
The mail service has settings for requiring various authentication methods for POP and
IMAP connections, as well as data transport over SSL.
Enabling Secure POP Authentication
Your POP mail service can protect users’ passwords by allowing Authenticated POP
(APOP), or Kerberos. When a user connects with APOP or Kerberos, the user’s mail client
software encrypts the user’s password before sending it to your POP service. Before
configuring your mail service to require secure authentication, make sure that your
users’ email applications and user accounts support the method of authentication you
choose.
Before enabling Kerberos authentication for incoming mail service, you must integrate
Mac OS X with a Kerberos server. If you’re using Mac OS X Server for Kerberos
authentication, this is already done for you. For instructions, see the Open Directory
administration guide.
If you want to require either of these authentication methods, then enable only the
one.
To set the POP authentication method:
1 In Server Admin, select Mail in the Computers & Services pane.
2 Click Settings.
3 Select the Advanced tab.
4 Check APOP, or Kerberos (as desired) in the POP3 list.
5 Click Save.
Enabling Less Secure Authentication for POP
You can choose to allow basic password (clear text) authentication. This is considered
to be less secure than APOP or Kerberos because the password itself is transmitted as
unencrypted, clear text.
If you want to require clear text authentication, then enable Clear as the only
authentication method.
To enable clear text POP authentication:
1 In Server Admin, select Mail in the Computers & Services pane.
2 Click Settings.
3 Select the Advanced tab.
4 Check Clear
5 Click Save.
The default setting is 32, and the maximum is 300.
LL2349.Book Page 19 Friday, August 22, 2003 2:47 PM
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