Got the mail this morning (Europe) and my first thought was "WTF"? Then "How the hell do I migrate all my customers"? I've used Mandrill for transactional mail

Got the mail this morning (Europe) and my first thought was "WTF"? Then "How the hell do I migrate all my customers"? I've used Mandrill for transactional mails for 4-5 years now. And always when I've had a project that requires some kind of e-mail notifications, password resets etc. I've always recommended Mandrill to my customers. So here I am, running and handling 8+ Mandrill accounts (many customers requires exclusive access to account, have one for personal projects etc. ). A few of them in the free tier, most of them payed. These changes will involve a whole lot of headache for me, and will sadly affect a few of my customers too. Firstly; from around $40/month as our e-mail costs are today; to more than a total of $240/month. Not the end of the world in itself, but: Secondly: NOT A SINGLE ONE of my customers, or me, want or have any use of MailChimp. They are two very different services with two very different purposes. Now I will have walk through with my customers on how they set up a Mailchimp account, explain to them why they have to do this and merge the account with their Mandrill one, explain to them "Oh, no – this is just a $10/month service that you don't need, or want, but have to signup to to enable those password reset emails or yours". Oh man... Of course I will change service in most of these cases, but that's also a pain, have to get in touch with the customers IT-departments to change DNS-settings, verify senders and all that – not a great start to this day... The whole idea is what we in Sweden call "hål i huvudet"; "Hole in the head" (as in missing a brain, not shooting someone).