This is very bad news which came from Mandrill, we had never expected for this.
But, few months back migrated all my marketing setup with <a href="https:&#x2F;&#x2F;easysendy.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;easysendy.com&#x2F;</a> which is also helping me to optimize email open rate with micro-delivery through many SMTP relay severs. The migration from Mandrill to MailGun was easy for this noon. Just add Mailgun to pro account. All thanks goes to new delivery provider services from easysendy.
Apart from emails, why I shifted with them, is very simple reason. I want to keep all customer data at single place, where we can keep track of all information and activity of our customers. Looking long term, they have plans to integrate social and push notifications in their product which will help us connect with our customers instantly on any device and social network. This is one of the feature, which I have been waiting for long-time, but, never got this from ESP vendors like Mailchimp. Because they are way too reluctant to adapt new technologies.
RIP Mandrill :P