ARC: relax restriction on building without SPF

[users/jgh/exim.git] / doc / doc-txt / experimental-spec.txt

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index 373d9dc4c583b016fcefb6939ffaa8dfe7b6987a..3b8a73428c454d4cf3a8e95a7420388a31ecdc2a 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -585,6 +585,13 @@ identify the ADMD.  Messages should be ARC-verified on entry to the ADMD,
 and ARC-signed on exit from it.
 
 
+Building with ARC Support
+--
+Enable using EXPERIMENTAL_ARC=yes in your Local/Makefile.
+You must also have DKIM present (not disabled), and you very likely
+want to have SPF enabled.
+
+
 Verification
 --
 An ACL condition is provided to perform the "verifier actions" detailed