$OpenBSD: patch-README_sendmail,v 1.1 2008/06/19 20:41:12 simon Exp $
--- README.sendmail.orig	Thu Jun 19 07:35:27 2008
+++ README.sendmail	Thu Jun 19 07:48:08 2008
@@ -1,3 +1,11 @@
+mlmmj needs the Return-Path: header in mail messages as it otherwise
+would refuse to operate correctly.
+The prog delivery agent puts the Return-Path: header into the mail by
+adding `P' to the delivery agent F= flags like this:
+
+define(`LOCAL_SHELL_FLAGS', `eu9P')dnl
+
+
 Using sendmail + VERP
 
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