| Name | Comment | |
|---|---|---|
| Postfix | Mail Transfer Agent (MTA) | |
| Dovecot | POP3, IMAP and Managesieve server | |
| Apache, Nginx | Web server | |
| OpenLDAP, ldapd(8) | LDAP server, used for storing mail accounts (optional). | |
| MySQL, MariaDB, PostgreSQL | SQL server used to store application data. Could be used to store mail accounts too. | |
| Amavisd-new | Interface between Postfix and SpamAssassin, ClamAV. it calls SpamAssassin and ClamAV for content-based spam/virus scanning. | |
| SpamAssassin | content-based spam scanner | |
| ClamAV | Virus scanner | |
| Cluebringer | A third-party postfix policy server | |
| iRedAPD | A very simple postfix policy server developed by iRedMail team | |
| Roundcube | Webmail (PHP) | |
| SOGo Groupware | A groupware which provides calendar (CalDAV), contact (CardDAV) and ActiveSync services. | |
| Fail2ban | Scans log files and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. | |
| Awstats | Apache and Postfix log analyzer |
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