There is an SES preset in the admin panel under email settings. Maybe you should try that as well?
That is what I ended up using.
How is this project? Still in development or is this ;forgotten;
@psychobunny Hey! Good to see you're still out there lol. I used to do some modding on phpBB3, and had ported a good portion of ADR to the phpBB3 system about the time you started on this project, it looks like. I would love to get in touch and see if we could maybe continue this project, or if you'd be willing to collaborate on something similar.