Okay, that's telling, but the canary on its own seems to be valid still - it's from August 16, 2016, and they say it should be 'updated approximately once per quarter'
> we have no plans on pulling the plug https://riseup.net/en/about-us/policy/government-faq …
And they've had indirect FBI attention before: https://riseup.net/en/about-us/press/fbi-seizes-anonymous-re...
The failure mode of their warrant canary is not that you stop getting email, but that other people start getting your email too.
While obviously this is not about preventing you from "getting email", you might not have received everything. You should consider the service compromised.