+#------------------------------------------------------------------------------
+# When a user other than root uses the -C option to override the configuration
+# file (including the Exim user when re-executing Exim to regain root
+# privileges for local message delivery), this will normally cause Exim to
+# drop root privileges. The TRUSTED_CONFIG_PREFIX_LIST option, specifies
+# a file which contains a list of trusted configuration prefixes (like the
+# ALT_CONFIG_PREFIX above), one per line. If the -C option is used to specify
+# a configuration file which matches a trusted prefix, root privileges are not
+# dropped by Exim.
+
+# TRUSTED_CONFIG_PREFIX_LIST=/usr/exim/trusted_configs
+
+