Apple Mac OS X Server Version 10.4 or Later Manuel d'utilisateur Page 34

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34 Chapter 1 Mail Service Setup
Enabling Less Secure SMTP Authentication
Your server can guard against being an open relay by requiring SMTP authentication.
(An open relay indiscriminately relays mail to other mail servers.) Requiring
authentication ensures that only known users—people with user accounts on your
server—can send mail from your mail service. You can choose to require, allow, or
disallow less secure authentication methods (plain text, or login) for SMTP mail service.
Plain authentication sends mail passwords as plain text over the network. Login
authentication sends a minimally secure crypt hash of the password over the network.
If you want to require any of these authentication methods, enable only one method.
To allow less secure 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 either Plain or Login in the SMTP section.
6 Click Save.
Configuring SSL Transport for SMTP Connections
SSL transport enables mail transmitted over the network to be securely encrypted. You
can choose to Require, Use, or Don’t Use SSL for IMAP connections. Before using SSL
connections, you must have a security certificate for mail use.
See “Certificate Manager in Server Admin on page 95 to for more information about
Certificates.
To configure SSL transport for SMTP connections:
1 In Server Admin, select Mail in the Computers & Services pane.
2 Click Settings.
3 Select the Advanced tab.
4 Select Security.
5 Click Require or Use to enable (Don’t Use to disable) in the SMTP SSL section.
6 Select the Certificate you want to use from the corresponding pop-up menu, if you are
using or requiring SSL.
7 Click Save.
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