From 12ee39c010a2dc9f58c2b6d1414a9ffa9d5867bd Mon Sep 17 00:00:00 2001
From: erichhasl <erich.hasl@gmail.com>
Date: Wed, 12 Jul 2017 18:18:18 +0200
Subject: [PATCH] filter duplicate email addresses

---
 jdav_web/mailer/mailutils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/jdav_web/mailer/mailutils.py b/jdav_web/mailer/mailutils.py
index cf50b04..389ec3a 100644
--- a/jdav_web/mailer/mailutils.py
+++ b/jdav_web/mailer/mailutils.py
@@ -17,7 +17,7 @@ def send(subject, content, sender, recipients, reply_to=None,
     else:
         kwargs = {}
     with mail.get_connection() as connection:
-        for recipient in recipients:
+        for recipient in set(recipients):
             email = EmailMessage(subject, content, sender, [recipient],
                                  connection=connection, **kwargs)
             if attachments is not None: