Best 3rd-party Email Service

Want the best email service, in terms of deliverability and spam-filtering?

Here are your options:

1. G-Suite – gold standard, also includes many Google cloud services, integrates nicely with Gmail mobile app, but expensive ($5/user)
2. MXroute – cheap and awesome service, unlimited domains and emails but limited space.
3. Rackspace/Zoho – like Google’s but cheaper (~$2-3/user) and lots of space
4. Microsoft – also great deliverability and comes with Office features
5. Mailgun – only for deliverability. Mailgun better than Sendgrid!
6. Amazon SES – also good, really cheap, but technical to set up.