Other LDAP Techniques

You’re most likely to have a need for LDAP for recipient validation, and that’s where I recommend you start with directory integration. Recipient validation provides several tangible benefits in an email environment. Beyond that, you’re likely to need LDAP group queries for applying policy to inbound and outbound messages to meet business requirements.

In some cases, some requirements aren’t quite met by the built-in query types, at least not directly. Necessity is the mother of invention, however, and the flexibility of the LDAP features on ESA mean that we can put group queries to creative use.

Using Group Queries for Routing

Sometimes, you’ll have a need to make email delivery decisions based on non-hostname information in an LDAP directory. For example, suppose you have a set of recipient email addresses that are used by applications, not people, and these messages should all be delivered to the same host. The relevant attributes in the LDAP object for these applications look like this: