Sounds like Pathwire had previously acquired both Mailgun and Mailjet (and "Email on Acid", which I hadn't heard of until today), then Sinch acquired Pathwire.

Sounds like Pathwire had previously acquired both Mailgun and Mailjet (and "Email on Acid", which I hadn't heard of until today), then Sinch acquired Pathwire. So lots of consolidation happening. I'd be curious to know how much of the marketshare they own now. Other players I know of are SendGrid, MailChimp, and Mandrill.