I am look into what LDAP is and how it works in regards to a Mail Client. My question is how does LDAP work? I understand that LDAP is:
A directory set of objects with attributes organized in a logical and hierarchical manner.
Does this mean that directory items are stored in a database or in some other fashion?
The real reason I ask my question is I have some general experience with Microsoft's Exchange server but am looking for and open source alternative. AKA looking for a tool that will use an IMAP or POP3 mail server and still allow you to link calendar, task and other information.
More Specifically I am looking for a good Linux Mail server that can do all the same types of things Exchange does.