command line tool to manage email (alias-)domains/accounts/aliases …
vmm is the easy to use and configurable command line tool for administrators and postmasters, to manage domains, alias-domains, accounts and relocated mail users. It allows the fast and easy management of mail servers.
vmm is written in Python. It's designed for installations using Dovecot and Postfix with a PostgreSQL backend.
DataSync Suite is an open source platform for integrating tools like Zimbra, SugarCRM, and Drupal. The tool is focused on a single sign-on, application data integration, and fast, flexible deployment.
DOGTOWN - Free Software & Tools for administrators ||| please read the Release Notes or docs @ http://dogtown.mare-system.de for a description of each package
nymproxy is a set of tools for using mixmaster remailers. It provides pseudonym support to a variety of mail programs via sendmail wrappers (for MUAs such a mutt) and SMTP/POP3 proxies (for programs such as Outlook).