Problem fixed. Legacy entry in "main.cf" Apologies, never mind.
-----Original Message----- From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Security Admin (NetSec) Sent: Saturday, August 20, 2016 11:43 AM To: Postfix users <postfix-users@postfix.org> Subject: Cannot load Certification Authority data (one of these days I am going to write down how to debug this) Recently updated to Postfix 3.1 Noticed the following error in my "mail.log" file: "postfix/smtp [ ]: Cannot load Certification Authority data, CAfile'"/etc/postfix/localrootCA.pem": disabling TLS support Where "localrootCA.pem" is the public key of the root CA for my Windows AD domain. Postfix is my mail gateway, and I use Exchange servers internally. If anyone knows how to debug this so that TLS support is not disabled, much appreciated. Edward Ray