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diff --git a/etc/exim4/conf.d/acl/30_exim4-config_check_mail b/etc/exim4/conf.d/acl/30_exim4-config_check_mail
new file mode 100644
index 0000000..7a6a3e7
--- /dev/null
+++ b/etc/exim4/conf.d/acl/30_exim4-config_check_mail
@@ -0,0 +1,16 @@
+
+### acl/30_exim4-config_check_mail
+#################################
+
+# This access control list is used for every MAIL command in an incoming
+# SMTP message. The tests are run in order until the address is either
+# accepted or denied.
+#
+acl_check_mail:
+  .ifdef CHECK_MAIL_HELO_ISSUED
+  deny
+    message = no HELO given before MAIL command
+    condition = ${if def:sender_helo_name {no}{yes}}
+  .endif
+
+  accept