I am developing social service in Drupal. There is need to send notifications to registered users.
Which option would be the easiest to integrate Drupal with and to send notifications to users?
- Amazon SES,
- Google App Engine,
- third party provider (like Sendgrid/PostageApp/CritSend)
SES/GAE are clear winners from business point of view.
This question is about which option would be the easiest to integrate with PHP code and which would provide least headache.
Please note that third party providers are not that easy to maintain, as they might drop emails without right MTA relay (unfortunately I experienced that problem with Sendgrid and another PHP service).