Doc: clarify location of DMARC dmarc_tld_file

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 0b1afb2478f0e142e123c454554dea2f78cd5d78..1e826aee172153f9fff248170fa425c5c348c353 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -595,12 +595,14 @@ package controlled locations (/usr/include and /usr/lib).
 
 2. Use the following global settings to configure DMARC:
 
-Required:
+Optional:
 dmarc_tld_file      Defines the location of a text file of valid
                     top level domains the opendmarc library uses
                     during domain parsing. Maintained by Mozilla,
                     the most current version can be downloaded
                     from a link at http://publicsuffix.org/list/.
+                    If unset, "/etc/exim/opendmarc.tlds" (hardcoded)
+                    is used.
 
 Optional:
 dmarc_history_file  Defines the location of a file to log results