Apple Mac OS X Server (version 10.2.3 or later) - Manual (Page 408)

408 Chapter 9
The mail service has settings for requiring secure IMAP authentication, changing the IMAP
response name, using case-sensitive IMAP folder names, controlling IMAP connections per
user, terminating idle IMAP connections, and changing the IMAP port number. All these
settings are described in this section.
Requiring Secure IMAP Authentication
Your IMAP mail service can protect users’ passwords by requiring that connections use the
Challenge-Response Authentication Method MD-5 (CRAM-MD5). When a user connects with
CRAM-MD5 authentication, the user’s mail client software encrypts the user’s password
before sending it to your IMAP service. Before configuring your mail service to require
CRAM-MD5 authentication, make sure all users’ mail client software is able to authenticate
using the CRAM-MD5 method.
Note: If you configure your mail service to require CRAM-MD5, mail users’ accounts must
be set to use a Password Server that has CRAM-MD5 enabled.
To require CRAM-MD5 authentication:
1 In Server Settings, click the Internet tab.
2 Click Mail Service and choose Configure Mail Service.
3 Click the Protocols tab and select Enable IMAP, if it is not already checked.
4 Click IMAP Options.
5 Select “Require CRAM-MD5 authentication” and click Save.
Changing the IMAP Response Name
You can change the DNS name that your IMAP mail service sends back to a user’s mail client
software when the client initiates an IMAP connection.
To change the IMAP response name:
1 In Server Settings, click the Internet tab.
2 Click Mail Service and choose Configure Mail Service.
3 Click the Protocols tab and select Enable IMAP, if it is not already checked.
4 Click IMAP Options.
5 Enter the DNS name you want your mail service to use when responding to IMAP
connections, then click Save.
Using Case-Sensitive IMAP Folder Names
You can allow mail users to create IMAP folders with names that are spelled the same but are
capitalized differently. For example, a user could have one folder named ‘”Urgent” and a
different folder named “URGENT.”
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