Add note on possible sendmail PRDR patch.

diff --git a/doc/doc-txt/experimental-spec.txt b/doc/doc-txt/experimental-spec.txt
index e209ad83869556e0b52d05814b020e41212c81a3..0b2e835345e35fb151fd309911e3ef568106f70b 100644 (file)
--- a/doc/doc-txt/experimental-spec.txt
+++ b/doc/doc-txt/experimental-spec.txt
@@ -13,6 +13,9 @@ Per-Recipient Data Reponse is an SMTP extension proposed by Eric Hall
 in a (now-expired) IETF draft from 2007.  It's not hit mainstream
 use, but has apparently been implemented in the META1 MTA.
 
+There is mention at http://mail.aegee.org/intern/sendmail.html
+of a patch to sendmail "to make it PRDR capable".
+
  ref: http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt
 
 If Exim is built with EXPERIMENTAL_OCSP there is a new config