Send a rather basic email notif

Also pep8 fixes

synapse/push/mailer.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from twisted.internet import defer
+
+import smtplib
+import email.utils
+import email.mime.multipart
+from email.mime.text import MIMEText
+
+
+class Mailer(object):
+    def __init__(self, store, smtp_host, smtp_port, notif_from):
+        self.store = store
+        self.smtp_host = smtp_host
+        self.smtp_port = smtp_port
+        self.notif_from = notif_from
+
+    @defer.inlineCallbacks
+    def send_notification_mail(self, user_id, email_address, push_action):
+        raw_from = email.utils.parseaddr(self.notif_from)[1]
+        raw_to = email.utils.parseaddr(email_address)[1]
+
+        if raw_to == '':
+            raise RuntimeError("Invalid 'to' address")
+
+        plainText = "yo dawg, you got notifications!"
+
+        text_part = MIMEText(plainText, "plain")
+        text_part['Subject'] = "New Matrix Notifications"
+        text_part['From'] = self.notif_from
+        text_part['To'] = email_address
+
+        smtp = smtplib.SMTP(self.smtp_host, self.smtp_port)
+        smtp.sendmail(raw_from, raw_to, text_part.as_string())
+        smtp.quit()