`val create_raw : ?⁠from:string ‑> to_:string list ‑> ?⁠cc:string list ‑> ?⁠reply_to:string list ‑> subject:string ‑> ?⁠id:string ‑> ?⁠in_reply_to:string ‑> ?⁠date:string ‑> ?⁠auto_generated:unit ‑> ?⁠extra_headers:(Email_message__.Headers.Name.t * Email_message__.Headers.Value.t) list ‑> ?⁠attachments:(attachment_name * Content.t) list ‑> Content.t ‑> t`
`val content : whitespace:Email_message__.Headers.Whitespace.t ‑> extra_headers:(Email_message__.Headers.Name.t * Email_message__.Headers.Value.t) list ‑> encoding:Email_message.Octet_stream.Encoding.known ‑> string ‑> t`
`val multipart : whitespace:Email_message__.Headers.Whitespace.t ‑> content_type:Mimetype.t ‑> extra_headers:(Email_message__.Headers.Name.t * Email_message__.Headers.Value.t) list ‑> t list ‑> t`