diff --git a/addons/calendar/models/calendar.py b/addons/calendar/models/calendar.py
index 5cc3e8faa2d..b02fed1bcf4 100644
--- a/addons/calendar/models/calendar.py
+++ b/addons/calendar/models/calendar.py
@@ -1065,11 +1065,13 @@ class Meeting(models.Model):
                 meeting_attendees |= attendee
                 meeting_partners |= partner
 
-            if meeting_attendees:
+            if meeting_attendees and not self._context.get('detaching'):
                 to_notify = meeting_attendees.filtered(lambda a: a.email != current_user.email)
                 to_notify._send_mail_to_attendees('calendar.calendar_template_meeting_invitation')
 
+            if meeting_attendees:
                 meeting.write({'attendee_ids': [(4, meeting_attendee.id) for meeting_attendee in meeting_attendees]})
+
             if meeting_partners:
                 meeting.message_subscribe(partner_ids=meeting_partners.ids)
 
@@ -1417,7 +1419,7 @@ class Meeting(models.Model):
             # do not copy the id
             if data.get('id'):
                 del data['id']
-            return meeting_origin.copy(default=data)
+            return meeting_origin.with_context(detaching=True).copy(default=data)
 
     @api.multi
     def action_detach_recurring_event(self):
diff --git a/addons/calendar/tests/test_calendar.py b/addons/calendar/tests/test_calendar.py
index 9b8fd31897f..b47868bbcb6 100644
--- a/addons/calendar/tests/test_calendar.py
+++ b/addons/calendar/tests/test_calendar.py
@@ -7,6 +7,7 @@ from datetime import datetime, timedelta, time
 from odoo import fields
 from odoo.tests.common import TransactionCase
 import pytz
+import re
 
 
 class TestCalendar(TransactionCase):
@@ -384,3 +385,60 @@ class TestCalendar(TransactionCase):
         })
 
         self.assertEqual(str(activity_id.date_deadline), '2018-10-16')
+
+    def test_event_creation_mail(self):
+        """
+        Check that mail are sent to the attendees on event creation
+        Check that mail are sent to the added attendees on event edit
+        Check that mail are NOT sent to the attendees when detaching a recurring event
+        """
+
+        def _test_one_mail_per_attendee(self, m, partners):
+            # check that every attendee receive a (single) mail for the event
+            for partner in partners:
+                mail = self.env['mail.mail'].search([
+                    ('recipient_ids', 'in', partner.id),
+                    ('subject', 'like', m.name),
+                    ])
+                self.assertEqual(len(mail), 1)
+
+        partners = [
+           self.env['res.partner'].create({'name':'testuser0','email': u'bob@example.com'}),
+           self.env['res.partner'].create({'name':'testuser1','email': u'alice@example.com'}),
+           ]
+        partner_ids = [(6, False, [p.id for p in partners]),]
+        now = fields.Datetime.now()
+        m = self.CalendarEvent.create({
+            'name': "mailTest1",
+            'allday': False,
+            'rrule': u'FREQ=DAILY;INTERVAL=1;COUNT=5',
+            'duration': 0.5,
+            'partner_ids': partner_ids,
+            'start': fields.Datetime.to_string(now + timedelta(days=10)),
+            'stop': fields.Datetime.to_string(now + timedelta(days=15)),
+            })
+
+        # every partner should have 1 mail sent
+        _test_one_mail_per_attendee(self, m, partners)
+
+        # adding more partners to the event
+        partners.extend([
+            self.env['res.partner'].create({'name':'testuser2','email': u'marc@example.com'}),
+            self.env['res.partner'].create({'name':'testuser3','email': u'carl@example.com'}),
+            self.env['res.partner'].create({'name':'testuser4','email': u'alain@example.com'}),
+            ])
+        partner_ids = [(6, False, [p.id for p in partners]),]
+        m.write({'partner_ids': partner_ids})
+
+        # more email should be sent
+        _test_one_mail_per_attendee(self, m, partners)
+
+        # calculate virtualid to detach one event
+        virtid = str(m.id) + '-' + ''.join(re.split('[\D]', fields.Datetime.to_string(now + timedelta(days=12))))
+
+        # detaching a virtual event in the chain
+        self.env['calendar.event'].browse(virtid).detach_recurring_event(values={'active':False})
+
+        # since the detach actually create an event in the backend
+        # we check that no mail notifications are sent to the attendees
+        _test_one_mail_per_attendee(self, m, partners)