This article will describe you step by step installation and configuration postfix mail server with cyrus-imap and sasl authentication. Postfix as MTA (mail transfer agent) SASL (Simple Authentication and Security Layer)for Authentication Cyrus-IMAP Package installation #yum install postfix system-switch-mail cyrus-imapd cyrus-plain cyrus-md5 cyrus-utils #rpm -qa cyrus* cyrus-sasl-lib-2.1.23-13.el6_3.1.x86_64 cyrus-sasl-plain-2.1.23-13.el6_3.1.x86_64...