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Enabling multiple methods allows a client to use any of the enabled methods. If you want to require any of these authentication methods, enable only one method.
To allow secure SMTP authentication:
1In Server Admin, select a computer in the Servers list, then select Mail.
2Click Settings.
3Select the Advanced tab.
4Select Security.
5Click the
6Click Save.
To allow less secure authentication:
1In Server Admin, select a computer in the Servers list, then select Mail.
2Click Settings.
3Select the Advanced tab.
4Select Security.
5In the SMTP section, click the Plain or Login checkbox.
6Click Save.
If you use the Server Setup Assistant and make your server and Open Directory Master, Kerberos and
IMAP and POP Authentication
Your IMAP/POP Mail service (Dovecot) can protect user passwords by requiring that connections use a require secure authentication using Kerberos,
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. You might allow these less secure authentication methods, which don’t encrypt passwords, if some users have mail client software that doesn’t support the secure methods.
Make sure your users’ mail applications and user accounts support the method of authentication you choose. If you configure Mail service to require
Chapter 3 Mail Service Advanced Configuration
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