Is a version of MassTransit tested and certified against specific versions of Rabbit MQ prior to its release? If so, is this information published?
On the CI server, MassTransit is tested using the 3.6 version(s). Locally, I test it with 3.7.x, and recently 3.8.x. So it's a variety, depending upon what's installed.
Any relatively recent version of RabbitMQ (3.6.x or later) should work fine.
Update: According to AppVeyor, they use v3.6.15-1