X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/ab3b76ceb6e8c6609df5169f814976c6c8d16da8..587d831d9428c40f108ac91c1e061096b17a7a3e:/doc/doc-txt/experimental-spec.txt?ds=inline

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index ce140c553..149598ee8 100644
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -799,6 +799,7 @@ arc_sign = <admd-identifier> : <selector> : <privkey>
 An option on the smtp transport, which constructs and prepends to the message
 an ARC set of headers.  The textually-first Authentication-Results: header
 is used as a basis (you must have added one on entry to the ADMD).
+Expanded; if unset, empty or forced-failure then no signing is done.