User Guide

Chapter 1 Deploying iPhone and iPod touch 19
IMAP Email
If you don’t use Microsoft Exchange, you can still implement a secure, standards-based
email solution using any email server that supports IMAP and is configured to require
user authentication and SSL. For example, you can access Lotus Notes/Domino or
Novell GroupWise email using this technique. The mail servers can be located within a
DMZ subnetwork, behind a corporate firewall, or both.
With SSL, iPhone and iPod touch support 128-bit encryption and X.509 certificates
issued by the major certificate authorities. They also support strong authentication
methods including industry-standard MD5 Challenge-Response and NTLMv2.
IMAP Network Setup Guidelines
 For additional security protection, install a digital certificate on the server from a
trusted certificate authority (CA). Installing a certificate from a CA is an important
step in ensuring that your proxy server is a trusted entity within your corporate
infrastructure. See “Credentials Settings” on page 39 for information about installing
certificates on iPhone.
 To allow iPhone and iPod touch devices to retrieve email from your server, open port
993 in the firewall and make sure that the proxy server is set to IMAP over SSL.
 To allow devices to send email, port 587, 465, or 25 must be open. Port 587 is used
first and is the best choice.
LDAP Directories
iPhone OS 3.0 or later allows you to access standards-based LDAP directory servers.
This allows you to provide a global address directory or other information similar to the
Global Address List in Microsoft Exchange.
When an LDAP account is configured on the device, the device searches for the
attribute namingContexts at the server’s root level to identify the default search base.
The search scope is set to subtree by default.
CalDAV Calendars
CalDAV support in iPhone OS 3.0 or later can be used to provide global calendars and
scheduling for organizations that don’t use Microsoft Exchange. iPhone works with
calendar servers that support the CalDAV standard.
Subscribed Calendars
If you want to publish read-only calendars of corporate events, such as holidays or
special event schedules, iPhone can subscribe to calendars and display the information
alongside their Microsoft Exchange and CalDAV calendars. iPhone works with calendar
files in the standard iCalendar (.ics) format.