Module Async_smtp__.Common
val is_accessible_directory : ?create_if_missing:unit -> string -> unit Async.Deferred.Or_error.t
val safely_ls_dir : string -> string list Async.Deferred.Or_error.t
val unlink : string -> unit Async.Deferred.Or_error.t
val rename : src:string -> dst:string -> unit Async.Deferred.Or_error.t