<DIV>Enabling users to&nbsp;take&nbsp;full advantage of&nbsp;the Exim system, this practical reference&nbsp;provides an essential resource for e-mail administrators, designers, or implementers of network applications. Included are instructions to deploy Exim as the SMTP email server throughout an organization, configure a reliable mail service to meet the specific needs of the&nbsp;site, tune the server to give optimal performance in&nbsp;the environment, as well as secure&nbsp;an e-mail system to prevent unauthorized use and maintain the confidentiality of messages.</DIV>