Last week MailChimp announced that they are shutting down the Mandrill Heroku Add-on, giving users until April 27th to migrate to another solution. Many of our customers have sought guidance on how and where to migrate, so we have asked our email providers to create guides for migrating from the Mandrill add-on to their respective services.
Mailgun: Migrating from the Heroku Mandrill Add-on to the Mailgun Add-on
Postmark: Migrating your Mandrill Heroku Add-on to Postmark
SendGrid: Replacing the Mandrill Heroku Add-on with the SendGrid Add-on