system environment/daemons
- arpalert - ARP traffic monitoring daemon
- clamsmtp - Antivirus SMTP content filter for Postfix
- courier-authlib - Courier authentication library
- courier-authlib - Courier authentication library
- courier-authlib-ldap - LDAP support for the Courier authentication library
- courier-authlib-ldap - LDAP support for the Courier authentication library
- courier-authlib-mysql - MySQL support for the Courier authentication library
- courier-authlib-mysql - MySQL support for the Courier authentication library
- courier-authlib-pgsql - MySQL support for the Courier authentication library
- courier-authlib-pgsql - MySQL support for the Courier authentication library
- courier-authlib-userdb - userdb support for the Courier authentication library
- courier-authlib-userdb - userdb support for the Courier authentication library
- courier-imap - Maildir-oriented IMAP4/POP3 server
- courier-imap - Maildir-oriented IMAP4/POP3 server
- hiawatha - Secure open-source HTTP server for UNIX
- hiawatha - Secure open-source HTTP server for UNIX
- policyd - Greylisting/Anti-Spam daemon for Postfix
- prngd - Pseudo Random Number Generator
- proxsmtp - SMTP proxy filter for the Postfix mail server
- siproxd - Application layer proxy for SIP-based softphones