For LDAP, there's a great tutorial on the IBM DeveloperWorks site here.<BR><BR>And as far as reasons to go with Linux for your mail server ...

How to Easily Block IP Addresses From Accessing a Desktop or Server Your email has been sent In this How to Make Tech Work tutorial, Jack Wallen shows how to add another layer of security to your ...

The open source company is bundling e-mail and groupware applications with its Linux server operating system in a new product aimed at the business market.