SendGrid

Email delivery a la AuthSMTP.

Looking for simple solutions to plug into Heroku apps. Gmail works great for development/staging/beta phase (500 email limit each day), but looking to cascade down to a secondary service.

First 500 emails a day to Gmail, after that use SendGrid.

Confused about pricing though. I love the metered style, not as thrilled about automatic charge each month. Want to pay for usage. Pricing page not clear.