module Id : sig ... end
val embedded_email : t ‑> Email_message.Email.t option
Some email
if this is an attached message/rfc822 content
val md5 : t ‑> string Core.Or_error.t
val filename : t ‑> attachment_name
val to_file : t ‑> string ‑> unit Async.Deferred.Or_error.t