diff --git a/scripts/docker-send-email.py b/scripts/docker-send-email.py
index 48a422a99db05ba2b044ffe1c7c7222dbe58c6c9..f1bb5e8b1b20bf20aff4a5e4e6b7fb654ed29e23 100644
--- a/scripts/docker-send-email.py
+++ b/scripts/docker-send-email.py
@@ -10,7 +10,7 @@ message_body = r"""{
 "channel_id": "123",
 "message_body": "<p>Dear subscribers,</p>\n\n<p>This week news follows.&nbsp;</p>\n\n<p>&nbsp;</p>\n\n<p><strong>Topic 1</strong></p>\n\n<ul>\n\t<li>bla&nbsp;</li>\n\t<li>bla</li>\n\t<li>bla</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>Topic 2</strong></p>\n\n<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>\n\n<p>&nbsp;</p>\n\n<p>See you next week,</p>\n\n<p>Myself.</p>\n",
 "summary": "This week news!",
-"email": "emmanuel.ormancey@cern.ch",
+"email": "igor.jakovljevic@cern.ch",
 "created_at": "12/01/2021, 13:59:40",
 "notification_id": "BD19EEA4-9DCA-48D9-A577-5DE9D2BF374A",
 "link": "http://toto.cern.ch",
diff --git a/vendor/django_mail/backends/smimesmtp.py b/vendor/django_mail/backends/smimesmtp.py
index cfd080432f79dbada63b9dedd3819bc8b780e1c7..871622b17f3937558589ec695211ec2463a3bcde 100644
--- a/vendor/django_mail/backends/smimesmtp.py
+++ b/vendor/django_mail/backends/smimesmtp.py
@@ -168,10 +168,16 @@ class EmailBackend(BaseEmailBackend):
                 # Ugly fix for obscure boundary with newline when signing:
                 # Relates to smail -> sign.py line 141 where new_msg.attach(copied_msg) does not keep the newline before boundary
                 #signed_message.as_string().replace('; boundary', ';\r\n boundary').replace('\r\n', '\n').replace('\n', '\r\n')
-                signed_message.as_bytes(linesep="\r\n").replace(b'; boundary', b';\r\n boundary')
+                #signed_message.as_bytes(linesep="\r\n").replace(b'; boundary', b';\r\n boundary')
+                self.prepareSignedMessage(signed_message)
             )
         except smtplib.SMTPException:
             if not self.fail_silently:
                 raise
             return False
         return True
+
+    def prepareSignedMessage(self, signed_message, boundary_text = "boundary"):
+        return signed_message.as_bytes(linesep=smtplib.CRLF).replace(
+            b'; '+ str.encode(boundary_text), 
+            b';'+ str.encode(smtplib.CRLF) + b' ' + str.encode(boundary_text))
\ No newline at end of file