XMail Server is an Internet and intranet mail server featuring an SMTP server, POP3 server plus a huge bunch of additional functionality. Written in multi-platform code, the sources compile under GNU/Linux, FreeBSD, Solaris and NT/2K.
XMail Queue Manager is a tool, that gives you full control over the multi level nested mail queue of XMail Server.
xmaillib.py is a collection of Python Classes that are the core of XMail Queue Manager.
XMail Library provides a basic server-, queue-, and spoolfile object. So it's pretty easy to write similar tools like XMail Queue Manager, e.g. command line only or with a web interface.
Download the archive from http://xmail.marketmix.com/products/xqm/xqm_lib.php
All the best, Harald