R1:e8f679fa88dd

Move the inbound mail list to the CLI

Summary: Same as D6419. See D6413.

Test Plan:
13 epriestley D6 Re: [local/Differential] [Request, 83 lines] D6: aabd
14 epriestley D6 Re: [local/Differential] [Request, 83 lines] D6: aabd
15 - - Re: [local/Diffusion] [Commit] rGTEST8fc313c77729: derp
16 - - Re: [local/Diffusion] [Commit] rGTEST8fc313c77729: derp…