Apple Mac OS X Server Version 10.4 or Later Manual de usuario descargar pdf (Pagina 33)

Chapter 1 Mail Service Setup 33

SMTP Authentication is used in conjunction with restricted SMTP mail transfer to limit

junk mail propagation. For more information on these settings, see “Limiting Junk Mail

and Viruses” on page 46.

Enabling Secure SMTP Authentication

Your server can guard against being an open relay by allowing SMTP authentication.

(An open relay indiscriminately relays mail to other mail servers.) You can configure the

mail service to require secure authentication using either the CRAM MD-5 or Kerberos

method. You can also allow the less secure plain and login authentication methods,

which don’t encrypt passwords, if some users have email client software that doesn’t

support the secure methods.

If you configure your mail service to require CRAM MD-5, mail users’ accounts must be

set to use a password server that has CRAM MD-5 enabled. For information, see the

Open Directory administration guide.

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.

Enabling SMTP Authentication will:

• Make your users authenticate with their email client before accepting any mail to

send.

• Frustrate mail server abusers trying to send mail without your consent through your

system.

If you want to require any of these authentication methods, enable only one method.

To allow secure SMTP authentication:

1 In Server Admin, select Mail in the Computers & Services pane.

2 Click Settings.

3 Select the Advanced tab.

4 Select Security.

5 Check CRAM MD-5, or Kerberos (as desired) in the SMTP section.

6 Click Save.

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Apple Mac OS X Server Version 10.4 or Later Manual de usuario Pagina 33