Module Bsmtp

val write : ?skip_prelude_and_prologue:bool -> ?log:Mail_log.t -> ?flows:Mail_log.Flows.t -> ?component:Mail_log.Component.t -> Async.Std.Writer.t -> Types.Envelope.t Async.Std.Pipe.Reader.t -> unit Async.Std.Deferred.Or_error.t