From 49cdfcec06564a9c56b1f592225b8600d0417cda Mon Sep 17 00:00:00 2001
From: Brad Warren <bmw@eff.org>
Date: Fri, 4 Aug 2017 10:20:36 -0700
Subject: [PATCH] add six dependency

---
 certbot-postfix/setup.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/certbot-postfix/setup.py b/certbot-postfix/setup.py
index 1f087ccc0..2fdcd46aa 100644
--- a/certbot-postfix/setup.py
+++ b/certbot-postfix/setup.py
@@ -12,6 +12,7 @@ install_requires = [
     # For pkg_resources. >=1.0 so pip resolves it to a version cryptography
     # will tolerate; see #2599:
     'setuptools>=1.0',
+    'six',
     'zope.interface',
 ]