Some ESPs have special blacklist handling for mailinator.com; switch to (deliverable, blackholed) anymail.info test addresses.
Using undeliverable @example.com recipient addresses leads some ESPs to flag the Anymail test accounts. Switch all live integration tests to mailinator.com recipients (unless they were already using the ESP's own "test sink" addresses).
Add Mailjet backend. (Docs and webhooks to follow.) Thanks to @Lekensteyn and @calvin.
