Newsletter: Bulk Send via worker

erpnext/tasks.py

@@ -0,0 +1,29 @@
+# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
+# MIT License. See license.txt
+
+from __future__ import unicode_literals
+import frappe
+from frappe.celery_app import celery_task, task_logger
+
+@celery_task()
+def send_newsletter(site, newsletter):
+	try:
+		frappe.connect(site=site)
+		doc = frappe.get_doc("Newsletter", newsletter)
+		doc.send_bulk()
+
+	except:
+		frappe.db.rollback()
+		task_logger.warn(frappe.get_traceback())
+
+		# wasn't able to send emails :(
+		doc.db_set("email_sent", 0)
+		frappe.db.commit()
+
+		raise
+
+	else:
+		frappe.db.commit()
+
+	finally:
+		frappe.destroy()