For the people like me who were happily using Mandrill's free plan and would like to continue to do that:

- Mailgun offers 10,000 emails/month for free

- SendGrid offers 12,000 emails/month for free

- Postmark gives you 25,000 free emails when you sign up, but they start costing money when those run out

Does anyone have any experience with SparkPost? They seem attractive to switch from Mandrill because they also use handlebars as a templating language.