the most important applications of a directory is storing email
addresses and other contact information. Although many ad hoc
solutions to this problem have been implemented over the years, LDAP
provides a natural online publishing service for this type of data.
This chapter explores the ins and outs of integrating email clients
(MUAs) and mail servers (MTAs) with an LDAP directory. It covers the
configuration details of some of the more popular email clients,
including Mozilla Mail, Pine, Microsoft Outlook, and Eudora.
We'll also discuss the schema required to support
these clients and the types of LDAP searches to expect when the
application attempts to locate a user in the directory.
On the server side, we'll discuss three popular
email servers?Sendmail, Postfix, and Exim?all of which
can use a directory. We will cover the level of LDAP support within
each MTA, the schema needed to support this integration, and the
configuration process for integrating an LDAP directory into a
production email environment. This discussion assumes that you are
familiar with basic MTA administration and the interaction between