X-Git-Url: https://git.exim.org/users/heiko/exim.git/blobdiff_plain/0e83c1487c22c96953f57e103d0fefabb15abe77..1bd642c265dae5643f16d023879043b7576f66a9:/doc/doc-txt/experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 5c8231123..15df15267 100644
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -793,7 +793,21 @@ standard header.
 	Note that it would be wise to strip incoming messages of A-R headers
 	that claim to be from our own <admd-identifier>.
 
-There are two new variables: $arc_state and $arc_state_reason.
+There are three new variables: $arc_state, $arc_state_reason, $arc_domains:
+
+  $arc_state		One of pass, fail, none
+  $arc_state_reason	(if fail, why)
+  $arc_domains		colon-sep list of ARC chain domains, in chain order.
+			problematic elements may have empty list elements
+  $arc_oldest_pass	lowest passing instance number of chain
+
+Example:
+  logwrite = oldest-p-ams: <${reduce {$lh_ARC-Authentication-Results:} \
+				{} \
+				{${if = {$arc_oldest_pass} \
+					{${extract {i}{${extract {1}{;}{$item}}}}} \
+					{$item} {$value}}} \
+			    }>
 
 Receive log lines for an ARC pass will be tagged "ARC".