We should define triggers for sending an email for these situations:
A) A user creates an event and invites friends with emails
B) A guest signs up for an event
C) A guest is added to a car (notify both guest & driver)
D) Remind all users of their ride status a set time before the event
Using the SendGrid API will allow for 25K emails/month free. See here for documentation: https://developers.google.com/appengine/articles/sendgrid
We should define triggers for sending an email for these situations: A) A user creates an event and invites friends with emails B) A guest signs up for an event C) A guest is added to a car (notify both guest & driver) D) Remind all users of their ride status a set time before the event