
Chapter 1 Mail Service Setup 23
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.
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 Check either Plain or Login in the SMTP section.
5 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 the Open Directory
administration guide for more information on enabling SSL.
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 Click Require, Use, or Don’t Use (as desired) in the SMTP SSL section.
5 Click Save.
LL2349.Book Page 23 Friday, August 22, 2003 2:47 PM
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