Linux, DevOps, Middleware and Cloud

 Dovecot:        Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with security primarily in mind. Dovecot is an excellent choice for both small and large installations. It's fast, simple to set up, requires no special administration and it uses very little memory .   Install Dovecot:   Installing and setting up Dovecot in Red Hat Enterprise Linux 5 or CentOS 5 is easy. All we have to do is to enable the services we would like to provide and we are good to go.   Make the use of yum or download dovecot and install it. Here I have  installed it using yum. i.e use  # yum install dovecot Configure Postfix: Go to the main configuration file dovecot.conf in /etc/dovecot.conf . We need to change a few key items.   Find the following keys and change its values as follows protocols = pop3 pop3s imap imaps mail_location = maildir:~/Maildir/ pop3_uidl_format = %08Xu%08Xv imap_client_workarou...

Firstly Lets Introduce with Term POSTFIX: Postfix:  In computing, Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail. It is intended as a fast, easier-to-administer, and secure alternative to the widely-used Sendmail MTA. Install Postfix: Make the use of yum or download postfix and install it. Here I have  installed it using yum. i.e use  # yum install postfix   Configure Postfix: Go to the main configuration file main.cf in /etc/postfix/ directoy W e need to make it listen to network request, accept mails bound to our domain and use maildir which is a better mailbox format than mbox the default.   Find the following keys and change its values as follows. inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain home_mailbox = Maildir/   In main.cf, lines starting with # are comments. Save the file after completing your changes. Make sure that all mail_spool_directory li...