Configure SSL2010/06/13

	Configure for SSL in order to encrypt datas in connection.
[1]	Create certificates first, see here.
[2]	Configure Postfix and Dovecot

[root@mail ~]#

vi /etc/postfix/main.cf

# add at the bottom

smtpd_use_tls = yes
smtpd_tls_cert_file = /etc/pki/tls/certs/server.crt
smtpd_tls_key_file = /etc/pki/tls/certs/server.key
smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_scache

[root@mail ~]#

vi /etc/postfix/master.cf

# line 17-18: uncomment

smtps inet n - n - - smtpd
-o smtpd_tls_wrappermode=yes

[root@mail ~]#

vi /etc/dovecot.conf

# line 89: uncomment

ssl = yes

# line 95,96: uncomment and specify certificate

ssl_cert_file =

/etc/pki/tls/certs/server.crt

ssl_key_file =

/etc/pki/tls/certs/server.key

[root@mail ~]#

/etc/rc.d/init.d/postfix restart

Shutting down postfix:

[ OK ]

Starting postfix:

[ OK ]

[root@mail ~]#

/etc/rc.d/init.d/dovecot restart

Stopping Dovecot Imap:

[ OK ]

Starting Dovecot Imap:

[ OK ]

	Configure on client. Change settings like following example.

	Run send/receive email on Outlook Express, then following warning is shown because certificate file is not installed in your system. It's no ploblem. Click 'Yes' to Proceed.

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