This sample application demonstrates different ways to send and receive email on App Engine
These samples are used on the following documentation pages:
- https://cloud.google.com/appengine/docs/python/mail/headers
- https://cloud.google.com/appengine/docs/python/mail/receiving-mail-with-mail-api
- https://cloud.google.com/appengine/docs/python/mail/sending-mail-with-mail-api
- https://cloud.google.com/appengine/docs/python/mail/attachments
- https://cloud.google.com/appengine/docs/python/mail/bounce