Thanks for the mention jdstafford - I'm on the application development team at SparkPost - we'd love to have you give our service a try. We've got a Slack community up at http://slack.sparkpost.com - feel free to jump in and say hi!
No doubt. You all support CharmCityJS which is awesome. I was actually using mandrill for a side project and will be switching to sparkpost. Thanks for the reply.
I'd stay away - far away - from sparkpost. We've been a volume user with sendgrid for years and recently started a test with sparkpost (well before the Mandrill thing), thinking it would be a good backup solution over our inhouse alternative. Suddenly this weekend, we're getting 403 rejections thru the sparkpost API. We were thinking it was an issue on our side and spent some time verifying it wasn't us. When we asked Sparkpost customer support to look into it, they eventually came back saying our Sparkpost account was suspended by their compliance team -- this with no indication or warning (and with us sending very low volume to known-good users in this test). fyi, our sendgrid reputation score is >98 and blacklist-free. We know how to maintain a good sender rep. Sparkpost CSE says their Compliance team is overwhelmed and maybe we'll hear back in a couple of days. Are you kidding me? We had high hopes for Sparkpost until this. Now, I can't see how we can possibly trust them, which is ironic to say the least.