Module Message.Data
Data.t is an on-disk Email.t. The type is abstract because we store a dot-encoded email on disk.
val to_email : t -> Async_smtp_types.Email.tval of_email : Async_smtp_types.Email.t -> tval load : string -> t Async.Deferred.Or_error.tval save : ?temp_file:string -> t -> string -> unit Async.Deferred.Or_error.t