OpenSolaris Tutorials
Installing and Configuring OpenVPN in OpenSolaris
Deploying OpenSolaris In Amazon EC2
Installing Postfix and Dovecot Under OpenSolaris

Installing Postfix and Dovecot Under OpenSolaris

Installing and Configuring Dovecot

Installing Dovecot

[;P:] Install the package from blastwave.

# /opt/csw/bin/pkgutil -i CSWdovecot

Create a directory to hold the dovecot configuration files and some more symlinks.

# mkdir /opt/csw/etc/dovecot
# ln -s /opt/csw/etc/dovecot/dovecot.conf /opt/csw/etc/dovecot.conf
# ln -s /opt/csw/etc/dovecot /etc/dovecot

Verify the SSL certificate and key are in place.

cert.key /opt/csw/ssl/private/dovecot.pem
cert.crt /opt/csw/ssl/certs/dovecot.pem

Configuring Dovecot

The dovecot configuration is very straightforward. This configuration uses a separate password file for each vhost. The %d in the userdb and passdb blocks translates to the vhost. When using a separate password file per vhost you don't put the @vhost in the login. When opting for a single password file emailaddr@vhost should be the login stored in the password file. Also disable_plaintext_auth is set to no, but that should be enabled on a production system.

Example /etc/dovecot/dovecot.conf:

# What protocols to listen for
protocols = pop3 imap
# Whether to enable/disable plaintext logins over unsecure protocols.
disable_plaintext_auth = no
pop3_uidl_format = %08Xu%08Xv
# Default maildir directory relative to the home directory.
default_mail_env = maildir:~/

# First UID/GID allowed to be used for a user
first_valid_uid = 101
first_valid_gid = 102
auth default {
    mechanisms = plain login
    passdb passwd-file {
        args = /data/mail/vhosts/%d/passwd
    userdb passwd-file {
        args = /data/mail/vhosts/%d/passwd
    socket listen {
        client {
            path = /opt/csw/var/spool/postfix/private/auth
            mode = 0660
            user = postfix
            group = postfix

The password file is similar to a standard unix password file. The encryption method is stored in {} before the password or hash. The UID and GID need to be above the first_valid_uid/first_valid_gid, and if using the postfix virtual mail server should be the UID/GID of the virtmail created when installing postfix. Password hashes can be generated with dovecotpw


[;P;] Finally we need to configure sasl. This is done by creating /etc/sasl/smtpd.conf with the following:

pwcheck_method: auxprop 
mech_list: PLAIN LOGIN

A lot of postfix/sasl installations store sasl configuration files in /etc/sasl so create the following symlink.

# ln -s /etc/sasl /etc/postfix/sasl

The very last thing that needs to be done is to restart postfix and dovecot.

# svcadm restart cswdovecot cswpostfix
Configuring Postfix <<  1 2 3
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