Very happy with mailgun. We had the same experience with sparkpost.
Our account (that we had been using for 6 months) was locked right after we paid a bit over $200 for October.
We filled a ticket and gave them all the info they requested. Eventually the reply was a template that didn't explain anything. They also refused to refund the remaining credits.
Here the nice rejection email:
Thank you for your interest in SparkPost. We strive to offer the very best email service, and to that end, we maintain a strict anti-abuse messaging policy.
Because we cannot offer you the high deliverability you would expect from SparkPost, we must decline to provide our services. We wish you the best in your future business endeavors.
Our account (that we had been using for 6 months) was locked right after we paid a bit over $200 for October.
We filled a ticket and gave them all the info they requested. Eventually the reply was a template that didn't explain anything. They also refused to refund the remaining credits.
Here the nice rejection email:
Thank you for your interest in SparkPost. We strive to offer the very best email service, and to that end, we maintain a strict anti-abuse messaging policy.
Because we cannot offer you the high deliverability you would expect from SparkPost, we must decline to provide our services. We wish you the best in your future business endeavors.