diff --git a/wallace/module_invitationpolicy.py b/wallace/module_invitationpolicy.py
--- a/wallace/module_invitationpolicy.py
+++ b/wallace/module_invitationpolicy.py
@@ -1161,7 +1161,6 @@
     """
     global auth
 
-    import smtplib
     from email.MIMEText import MIMEText
     from email.Utils import formatdate
     from email.header import Header
@@ -1284,14 +1283,13 @@
     msg['From'] = Header(utils.str2unicode('%s' % orgname) if orgname else '')
     msg['From'].append("<%s>" % orgemail)
 
-    modules._sendmail(orgemail, receiving_user['mail'], msg.as_string())
+    success = modules._sendmail(orgemail, receiving_user['mail'], msg.as_string())
     log.debug(_("Sent update notification to %r: %r") % (receiving_user['mail'], success), level=8)
 
 def send_cancel_notification(object, receiving_user, deleted=False, sender=None, comment=None):
     """
         Send a notification about event/task cancellation
     """
-    import smtplib
     from email.MIMEText import MIMEText
     from email.Utils import formatdate
     from email.header import Header
@@ -1346,7 +1344,7 @@
     msg['From'] = Header(utils.str2unicode('%s' % orgname) if orgname else '')
     msg['From'].append("<%s>" % orgemail)
 
-    modules._sendmail(orgemail, receiving_user['mail'], msg.as_string())
+    success = modules._sendmail(orgemail, receiving_user['mail'], msg.as_string())
     log.debug(_("Sent cancel notification to %r: %r") % (receiving_user['mail'], success), level=8)
 
 def is_auto_reply(user, sender_email, type):
diff --git a/wallace/module_resources.py b/wallace/module_resources.py
--- a/wallace/module_resources.py
+++ b/wallace/module_resources.py
@@ -1312,7 +1312,6 @@
     """
         Send a reservation notification to the resource owner
     """
-    import smtplib
     from pykolab import utils
     from email.MIMEText import MIMEText
     from email.Utils import formatdate
@@ -1356,17 +1355,7 @@
             resource['cn'], participant_status_label(status) if success else _('failed')
         ))
 
-        smtp = smtplib.SMTP("localhost", 10027)
-
-        if conf.debuglevel > 8:
-            smtp.set_debuglevel(True)
-
-        try:
-            smtp.sendmail(resource['mail'], owner['mail'], msg.as_string())
-        except Exception, e:
-            log.error(_("SMTP sendmail error: %r") % (e))
-
-        smtp.quit()
+        modules._sendmail(resource['mail'], owner['mail'], msg.as_string())
 
 def owner_notification_text(resource, owner, event, success):
     organizer = event.get_organizer()