include sig ... endval sexp_of_t : t ‑> Base.Sexp.tval id : t ‑> Message_id.tval spool_date : t ‑> Core.Time.tval last_relay_attempt : t ‑> (Core.Time.t * Core.Error.t) optionval parent_id : t ‑> Async_smtp_types.Smtp_envelope.Id.tval envelope_info : t ‑> Async_smtp_types.Smtp_envelope.Info.tval status : t ‑> [ `Send_now | `Send_at of Core.Time.t | `Sending | `Frozen | `Removed | `Delivered | `Quarantined of Async_smtp__.Quarantine_reason.t ]val file_size : t ‑> Core.Byte_units.t optionval envelope : t ‑> Async_smtp_types.Smtp_envelope.t option