From a891f462bb7e7058c046463c2f0216fb8bfe5764 Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Mon, 27 Apr 2020 19:14:56 +0100
Subject: [PATCH] base.m4: Accept bad `HELO' hosts from `submission' clients.

---
 base.m4 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/base.m4 b/base.m4
index c0dd892..51cacc8 100644
--- a/base.m4
+++ b/base.m4
@@ -125,6 +125,10 @@ SECTION(global, acl)m4_dnl
 acl_smtp_helo = helo
 SECTION(acl, misc)m4_dnl
 helo:
+	## Don't worry if this is local submission.  MUAs won't necessarily
+	## have a clear idea of their hostnames.  (For some reason.)
+	accept	 condition = ${if !eq{$acl_c_mode}{submission}}
+
 	## Check that the caller's claimed identity is actually plausible.
 	## This seems like it's a fairly effective filter on spamminess, but
 	## it's too blunt a tool.  Rather than reject, add a warning header.
-- 
2.11.0