To save you some time, we have a blog post covering the criteria to use: <a href="http:&#x2F;&#x2F;blog.sendwithus.com&#x2F;which-email-service-provider-should-you-use&#x2F;" rel="nofollow">http:&#x2F;&#x2F;blog.sendwithus.com&#x2F;which-email-service-provider-shou...</a><p>I&#x27;m biased (as the cofounder), but I strongly believe that you should treat email delivery as a commodity and use a product like Sendwithus.com on top of it.