--- a/src/pyams_scheduler/task.py	Tue Mar 17 16:09:59 2015 +0100
+++ b/src/pyams_scheduler/task.py	Fri Mar 20 17:11:26 2015 +0100
@@ -9,7 +9,6 @@
 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
 # FOR A PARTICULAR PURPOSE.
 #
-from zope.lifecycleevent.interfaces import IObjectRemovedEvent, IObjectAddedEvent, IObjectModifiedEvent
 
 __docformat__ = 'restructuredtext'
 
@@ -30,7 +29,9 @@
 from pyramid_mailer.interfaces import IMailer
 from transaction.interfaces import ITransactionManager
 from zope.component.interfaces import ISite
+from zope.interface.interfaces import ComponentLookupError
 from zope.intid.interfaces import IIntIds
+from zope.lifecycleevent.interfaces import IObjectRemovedEvent, IObjectAddedEvent, IObjectModifiedEvent
 
 # import packages
 import transaction
@@ -48,7 +49,6 @@
 from zope.container.contained import Contained
 from zope.container.folder import Folder
 from zope.interface import implementer, alsoProvides, noLongerProvides
-from zope.lifecycleevent import ObjectRemovedEvent, ObjectModifiedEvent
 from zope.location import locate
 from zope.schema.fieldproperty import FieldProperty
 
@@ -319,7 +319,9 @@
         self.check_history()
 
     def send_report(self, report, status, registry):
-        if not self.__parent__.report_mailer:
+        try:
+            mailer_name = self.__parent__.report_mailer
+        except (TypeError, ComponentLookupError):
             return
         if ((status == 'Empty') and not self.send_empty_reports) or \
            ((status == 'OK') and self.report_errors_only):
@@ -329,7 +331,7 @@
             message_target = self.errors_target or message_target
         if not message_target:
             return
-        mailer = registry.queryUtility(IMailer, self.__parent__.report_mailer)
+        mailer = registry.queryUtility(IMailer, mailer_name)
         if mailer is not None:
             report_source = self.__parent__.report_source
             if status == 'Error':