system environment/daemons
- dansguardian - Content filtering web proxy
- dovecot - Secure imap and pop3 server
- dovecot-mysql - MySQL back end for dovecot
- dovecot-pgsql - Postgres SQL back end for dovecot
- dovecot-pigeonhole - Sieve and managesieve plug-in for dovecot
- e2guardian - Content filtering web proxy
- mailgraph - A RRDtool frontend for Mail statistics
- mailgraph-selinux - A RRDtool frontend for Mail statistics
- mod_gnutls - GnuTLS module for the Apache HTTP server
- nginx - High performance web server
- opendmarc - DMARC milter and library
- policyd-weight - Policy Daemon for the Postfix MTA
- postfix - Postfix Mail Transport Agent
- postfix-sysvinit - SysV initscript for postfix
- postsrsd - PostSRSd provides the Sender Rewriting Scheme (SRS) via TCP-based lookup tables for Postfix.
- python-carbon - Back-end data caching and persistence daemon for Graphite
- queuegraph - A RRDtool frontend for Mail statistics
- queuegraph-selinux - A RRDtool frontend for Mail statistics
- smf-spf - Mail filter for Sender Policy Framework verification
- squid - The Squid proxy caching server
- squid-helpers - Squid helpers