This page contains a list of resources I’ve found helpful in the past. System Administration Generally (Linux) Nixcraft The Geek Stuff GNU Links Wikipedia’s Explanation of GNU GNU operating System Free Software Foundation Exim Links Exim Official Website Exim Documentation - Current Version Exim Git Repo Exim Bugs Exim Mailing Lists - includes links for searchng * the archives through Exim Wiki Exim - Debian Wiki Sites with Exim Info Caveat: Some of these sites are older sites and while the concepts presented are helpful to gaining an understanding of Exim, Exim itself has moved on in its development.