IRedMail

iRedMail is a shell script that automatically installs and configures all necessary mail server components on your Linux/BSD server, thus eliminating manual installation and configuration. With iRedMail, you can easily create unlimited mailboxes and unlimited mail domains in a web-based admin panel. Mailboxes can be stored in MariaDB/MySQL, PostgreSQL database, or OpenLDAP. The following is a list of open-source software that will be automatically installed and configured by iRedMail.

Postfix SMTP server
Dovecot IMAP server
Nginx web server to serve the admin panel and webmail
OpenLDAP, MySQL/MariaDB, or PostgreSQL for storing user information
Amavised-new for DKIM signing and verification
SpamAssassin for anti-spam
ClamAV for anti-virus
Roundcube webmail
SOGo groupware, providing webmail, calendar (CalDAV), contacts (CardDAV), tasks and ActiveSync services.
Fail2ban for protecting SSH
mlmmj mailing list manager
Netdata server monitoring
iRedAPD Postfix policy server for greylisting

Installasi

Set a fully qualified domain name (FQDN) hostname on your server

No matter your server is a testing machine or production server, it's strongly recommended to set a fully qualified domain name (FQDN) hostname.

Enter command hostname -f to view the current hostname:

$ hostname -f
mx.example.com

On Debian/Ubuntu Linux, hostname is set in two files: /etc/hostname and /etc/hosts.

/etc/hostname: short hostname, not FQDN.

mx

/etc/hosts: static table lookup for hostnames. Warning: Please list the FQDN hostname as first item.

# Part of file: /etc/hosts
127.0.0.1   mx.example.com mx localhost localhost.localdomain

Verify the FQDN hostname. If it wasn't changed after updating above two files, please reboot server to make it work.

$ hostname -f
mx.example.com

Source

Verify the FQDN hostname. If it wasn't changed after updating above two files, please reboot server to make it work.