From 894b5f242ab0450042b38823681d96d6dd9fd82d Mon Sep 17 00:00:00 2001
From: Julien Cristau <jcristau@debian.org>
Date: Tue, 4 Jul 2017 20:59:29 +0200
Subject: [PATCH] exim: postgrey in stretch handles host to network address
 translation

Rather than using ${mask:...} in the exim config, we can let postgrey do
this on its own.  Otherwise, it gets confused with ipv6 addresses using
dots instead of colons as separators, and crashes
(https://bugs.debian.org/867201).
---
 modules/exim/templates/eximconf.erb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/exim/templates/eximconf.erb b/modules/exim/templates/eximconf.erb
index 828186784..7517c26b6 100644
--- a/modules/exim/templates/eximconf.erb
+++ b/modules/exim/templates/eximconf.erb
@@ -782,7 +782,11 @@ check_recipient:
                      protocol_name=${uc:$received_protocol}\n\
                      instance=${acl_m_grey}\n\
                      helo_name=${sender_helo_name}\n\
+<%- if scope.call_function('versioncmp', [@lsbmajdistrelease, '8']) <= 0 -%>
                      client_address=${substr_-3:${mask:$sender_host_address/24}}\n\
+<%- else -%>
+                     client_address=${sender_host_address}\n\
+<%- end -%>
                      client_name=${sender_host_name}\n\
                      sender=${sender_address}\n\
                      recipient=$local_part@$domain\n\n
-- 
2.20.1