val status : (Core.Unit.t, Async_smtp__.Spool.Stable.Status.V1.t) Async.Rpc.Rpc.t
val freeze : (Async_smtp__.Spool.Stable.Message_id.V1.t list, Core.Unit.t Core.Or_error.t) Async.Rpc.Rpc.t
val remove : (Async_smtp__.Spool.Stable.Message_id.V1.t list, Core.Unit.t Core.Or_error.t) Async.Rpc.Rpc.t
val set_max_concurrent_send_jobs : (Core.Int.t, Core.Unit.t) Async.Rpc.Rpc.t