Postfix Dovecot Notes - Ubuntu 12.04 LTS

Postfix config files are in /etc/postfix path
Dovecot config files are in /etc/dovecot path

Either you need to install postfixadmin packages or you can do it from terminal.
How to add a new mail account from terminal is explained here step by step.

1. Login as root to mail server
2. Execute below command
   
   useradd -g vmail -d /var/mail -s /sbin/nologin testuser
   passwd testuser

   Now a new user in system is created. Please note that this user does not have login privilege.

3. Goto your email client and check mail with user as testuser and password as set by you.

1. To enable / disable logs for postfix, goto /etc/postfix/master.cf file and modify below line
   
   smtp inet n - n - - smtpd

   to

   smtp inet n - n - - smtpd -v

1. To enable disable logs for Dovecot goto /etc/dovecot/conf.d/10-logging.conf file and comment below entries
   
   log_path = /var/log/dovecot.log
   debug_log_path = /var/log/dovecot.log
2. Modify line
   
   auth_verbose = yes

   to
   

   auth_verbose = no
3. Modify line
   
   auth_debug = yes

   to
   

   auth_debug = no
4. Modify line
   
   auth_debug_passwords = yes

   to
   

   auth_debug_passwords = no

1. Go to webmail/config/config.inc.php file
2. Modify line
   
   $config['imap_debug'] = true;

   to
   

   $config['imap_debug'] = false;

1. Also you need to restart the corresponding service so that your new configuration takes effect.
   
   /etc/init.d/postfix restart
   /etc/init.d/dovecot restart