=========
   Postfix
=========

----[ Tried on Red Hat Enterprise Linux v4 ]


1) Install it when you install the S.O.
or
# up2date install postfix

2) Config:
# vi /etc/postfix/main.cf
mydomain = research.hm.com
myhostname = mail.research.hm.com
mydestination = $myhostname, localhost, $mydomain
mynetworks = 200.100.100.0/27, 127.0.0.0/8
mynetworks_style = host
myorigin = $mydomain

#### This is by default ####
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
debugger_command =
debug_peer_level = 2
html_directory = no
inet_interfaces = all
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
newaliases_path = /usr/bin/newaliases.postfix
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.2.10/README_FILES
sample_directory = /usr/share/doc/postfix-2.2.10/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
unknown_local_recipient_reject_code = 550
         xxgdb $daemon_directory/$process_name $process_id & sleep 5

3) Stop sendmail
# service sendmail stop

You can switch MTAs with this:
# /usr/sbin/redhat-switch-mail

4) Start postfix
# postfix start

Optional:
5) We can Verify all the parameters with:
# postconf

---------------
Troubleshooting:
---------------
1)Problem: Warning in /var/log/maillog
Sep 21 16:02:42 mail postfix/smtpd[24696]: warning: database /etc/postfix/access.db is older than source file /etc/postfix/access
2)Solution: 
# cd /etc/postfix && postmap access && postfix reload


=========
  dovecot
=========
1) Install
# up2date install dovecot

2) Config:
# vi /etc/dovecot.conf
protocols = imap imaps pop3 pop3s
imap_listen = *
pop3_listen = *
imaps_listen = *
pop3s_listen = *

3) service dovecot start