`val iter : t ‑> envelopes:((t, Async_smtp_types__.Envelope_bodiless_routed.t list) Fieldslib.Field.t ‑> t ‑> Async_smtp_types__.Envelope_bodiless_routed.t list ‑> unit) ‑> email_body:((t, Email_message.Email.Raw_content.t) Fieldslib.Field.t ‑> t ‑> Email_message.Email.Raw_content.t ‑> unit) ‑> unit`
`val fold : t ‑> init:'acc__0 ‑> envelopes:('acc__0 ‑> (t, Async_smtp_types__.Envelope_bodiless_routed.t list) Fieldslib.Field.t ‑> t ‑> Async_smtp_types__.Envelope_bodiless_routed.t list ‑> 'acc__1) ‑> email_body:('acc__1 ‑> (t, Email_message.Email.Raw_content.t) Fieldslib.Field.t ‑> t ‑> Email_message.Email.Raw_content.t ‑> 'acc__2) ‑> 'acc__2`
`val for_all : t ‑> envelopes:((t, Async_smtp_types__.Envelope_bodiless_routed.t list) Fieldslib.Field.t ‑> t ‑> Async_smtp_types__.Envelope_bodiless_routed.t list ‑> bool) ‑> email_body:((t, Email_message.Email.Raw_content.t) Fieldslib.Field.t ‑> t ‑> Email_message.Email.Raw_content.t ‑> bool) ‑> bool`
`val exists : t ‑> envelopes:((t, Async_smtp_types__.Envelope_bodiless_routed.t list) Fieldslib.Field.t ‑> t ‑> Async_smtp_types__.Envelope_bodiless_routed.t list ‑> bool) ‑> email_body:((t, Email_message.Email.Raw_content.t) Fieldslib.Field.t ‑> t ‑> Email_message.Email.Raw_content.t ‑> bool) ‑> bool`
`val to_list : t ‑> envelopes:((t, Async_smtp_types__.Envelope_bodiless_routed.t list) Fieldslib.Field.t ‑> t ‑> Async_smtp_types__.Envelope_bodiless_routed.t list ‑> 'elem__) ‑> email_body:((t, Email_message.Email.Raw_content.t) Fieldslib.Field.t ‑> t ‑> Email_message.Email.Raw_content.t ‑> 'elem__) ‑> 'elem__ list`
`val map : t ‑> envelopes:((t, Async_smtp_types__.Envelope_bodiless_routed.t list) Fieldslib.Field.t ‑> t ‑> Async_smtp_types__.Envelope_bodiless_routed.t list ‑> Async_smtp_types__.Envelope_bodiless_routed.t list) ‑> email_body:((t, Email_message.Email.Raw_content.t) Fieldslib.Field.t ‑> t ‑> Email_message.Email.Raw_content.t ‑> Email_message.Email.Raw_content.t) ‑> t`
`val set_all_mutable_fields : t ‑> unit`