Postfix Installer

Following script may be used for configuring complete and secure email server on fresh install of Debian 9. It will probably work on other distributions using apt-get. After minor changes you'll be able to use it on other Linux distros.

This installer is created by solusipse: https://gist.github.com/solusipse/7ed8e1da104baaee3f05 with enhancements from the following forks:

• https://gist.github.com/MarcelFox/6f4e68af1d4ca3c92a423d57a3bc4d42

What it does?

02_postfix.sh:

• Install Postfix and configure it with TLS support.
• Install Dovecot and configure it's transport on Postfix.
• Download, extract and correct permissions for Postfixadmin.
• Download, extract and correct permissions for Roundcube.

03_nginx.sh

This script is optional. It's intended to use only for nginx (I did not review this one from the fork).

04_opendkim.conf:

• Install opendkim packages.
• Configure opendkim for the given domain (prompt at the script).
• Set directories tree and files for the domain key at "/etc/opendkim/".
• The script can be used more than once, to configure new domains (warns will appear when needed).

What it doesn't?

• It does not configure automatically postfixadmin, neither virtualhosts on apache.
• It does not configure automatically roundcube, neither virtualhosts on apache.
• It does not set anything related to DNS, those must be set manually (but it warns about).
• It does not configure Apache in no way whatsoever.
• It does not mess or set anything related with DNS server configuration.

Usage

1. Run postfix.sh script.
2. Configure postgres to allow connections.
3. Configure postfix admin. Remember to set these:

$CONF['configured'] = true;
$CONF['domain_path'] = 'YES';
$CONF['domain_in_mailbox'] = 'YES';
$CONF['database_type'] = 'pgsql';
$CONF['database_host'] = 'localhost';
$CONF['database_user'] = 'postfix_user';
$CONF['database_password'] = 'PASSWORD FROM INSTALLER SCRIPT';
$CONF['database_name'] = 'postfix_db';

4. Create domain and at least one user.
5. Configure roundcube. Set imap to port 993, host to: ssl://localhost. Set smtp to port 587, host to tls://localhost.
6. Ran and configure opendkim.sh to install opendkim and generate new keys for the given domain.

This is just a draft right now, it will be updated.