Linux

Diagram of mail clients connecting to OpenLDAP over LDAPS, trusted by a private root CA

Building a Private LDAP Address Book with OpenLDAP

A private OpenLDAP address book secured with LDAPS, providing centralised contact lookup for Mutt and Thunderbird on a LAN.

Diagram of workstations relaying mail through a Postfix smart host to an upstream provider

Mail Relay at Home: Postfix Smart Host

How to build a reliable home mail relay using Postfix as a smart host with msmtp clients on Linux workstations, enabling sendmail-compatible outbound email for scripts and system alerts.