`include Email_message`
`module Bigstring_shared = Email_message.Bigstring_shared`
`module Email = Email_message.Email`
`module Email_address = Email_message__.Email_address1`
`module Email_headers = Email_message__.Headers`
`module Email_selector = Email_message__.Selector`
`module Email_wrapper = Email_message__.Wrapper`
`module Mimestring = Email_message.Mimestring`
`module Octet_stream = Email_message.Octet_stream`
`module String_monoid = Email_message.String_monoid`
`module Email_message_stable = Email_message.Email_message_stable`
`module Private = Email_message.Private`
`module Smtp_socket_address = Async_smtp_types__.Socket_address`
`module Smtp_extension : sig ... end`
`module Smtp_envelope : sig ... end`
`module Async_smtp_types_stable : sig ... end`