Apparently after Mandrill announcement, the SparkPost raised the free tier to 100K&#x2F;month (from 10K). Pretty generous limit. They have a very good reputation.<p><a href="https:&#x2F;&#x2F;www.sparkpost.com&#x2F;pricing" rel="nofollow">https:&#x2F;&#x2F;www.sparkpost.com&#x2F;pricing</a>