Add SendGrid notify component

.coveragerc

@@ -116,6 +116,7 @@ omit =
     homeassistant/components/notify/pushetta.py
     homeassistant/components/notify/pushover.py
     homeassistant/components/notify/rest.py
+    homeassistant/components/notify/sendgrid.py
     homeassistant/components/notify/slack.py
     homeassistant/components/notify/smtp.py
     homeassistant/components/notify/syslog.py

homeassistant/components/notify/sendgrid.py

@@ -0,0 +1,51 @@
+"""
+homeassistant.components.notify.sendgrid
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+SendGrid notification service.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/notify.sendgrid/
+"""
+import logging
+
+from homeassistant.components.notify import (
+    ATTR_TITLE, DOMAIN, BaseNotificationService)
+from homeassistant.helpers import validate_config
+
+REQUIREMENTS = ['sendgrid>=1.6.0,<1.7.0']
+_LOGGER = logging.getLogger(__name__)
+
+
+def get_service(hass, config):
+    """ Get the SendGrid notification service """
+    if not validate_config({DOMAIN: config},
+                           {DOMAIN: ['api_key', 'sender', 'recipient']},
+                           _LOGGER):
+        return None
+
+    api_key = config['api_key']
+    sender = config['sender']
+    recipient = config['recipient']
+    return SendgridNotificationService(api_key, sender, recipient)
+
+
+# pylint: disable=too-few-public-methods
+class SendgridNotificationService(BaseNotificationService):
+    """ Implements the notification service for email via Sendgrid. """
+
+    def __init__(self, api_key, sender, recipient):
+        self.api_key = api_key
+        self.sender = sender
+        self.recipient = recipient
+
+        from sendgrid import SendGridClient
+        self._sg = SendGridClient(self.api_key)
+
+    def send_message(self, message='', **kwargs):
+        """ Send an email to a user via SendGrid. """
+        subject = kwargs.get(ATTR_TITLE)
+
+        from sendgrid import Mail
+        mail = Mail(from_email=self.sender, to=self.recipient,
+                    html=message, text=message, subject=subject)
+        self._sg.send(mail)

requirements_all.txt

@@ -232,6 +232,9 @@ schiene==0.14
 # homeassistant.components.scsgate
 scsgate==0.1.0
 
+# homeassistant.components.notify.sendgrid
+sendgrid>=1.6.0,<1.7.0
+
 # homeassistant.components.notify.slack
 slacker==0.6.8