HEATKEYS

Zimbra provides open source email and calendar groupware software, Zimbra is a popular choice for Linux and Mac OS X email servers and supports SaaS deployment, appliances and virtualization platforms.

TechRepublic helps IT decision-makers identify technologies and strategies to empower workers and streamline business processes. The site delivers a unique blend of original content by IT professionals, peer-to-peer advice from the largest community ...

ClearFoundation is a developer community for ClearOS, a Linux Internet Network, Gateway and Server for small business and distributed networks.

Learn how to setup and deploy a Linux based mail server

Postfix forum. Postfix is a mail server that attempts to be fast, easy to administer, and secure. The outside has a definite Sendmail-ish flavor, but the inside is completely different.

Linux blog by Vivek - Includes news, help, tutorials, programming, tips and how-to guides for Linux, UNIX, and BSD.

LinuxQuestions.org offers a free Linux forum where Linux newbies can ask questions and Linux experts can offer advice. Topics include security, installation, networking and much more.