Starttls.Clienttype nonrec error = Colombe.Rfc1869.errorval encode : t -> Colombe.Rfc1869.encodeval action : t -> Colombe.Rfc1869.action optionval decode : Colombe.Rfc1869.decode -> t -> (t, error) resultval mail_from : t -> Colombe.Reverse_path.t -> (string * string option) listval rcpt_to : t -> Colombe.Forward_path.t -> (string * string option) list