use only one connection to send multiple mails

jdav_web/mailer/mailutils.py

@@ -1,3 +1,4 @@
+from django.core import mail
 from django.core.mail import EmailMessage
 
 
@@ -13,8 +14,10 @@ def send(subject, content, sender, recipients, reply_to=None,
         kwargs = {"reply_to": [reply_to]}
     else:
         kwargs = {}
+    with mail.get_connection() as connection:
         for recipient in recipients:
-        email = EmailMessage(subject, content, sender, [recipient], **kwargs)
+            email = EmailMessage(subject, content, sender, [recipient],
+                                 connection=connection, **kwargs)
             if attachments is not None:
                 for attach in attachments:
                     email.attach_file(attach)