A person entitled to receive a notice pursuant to section 468.14, 468.16, or 468.17, or a person entitled to receive a notice under another provision of this chapter by the postal service or personal service, may request that the board responsible for providing such notice to the person also send an unofficial version of the notice to the person’s electronic mail address. The board may retain the electronic mail addresses of private persons for the purpose of sending those persons electronic mail under this section or any other correspondence if the person consents to receiving that correspondence by electronic mail. The electronic mail addresses retained by the board are confidential records under section 22.7. A person is not required to file an electronic mail address with a board and may demand that the person’s electronic mail address be removed from the record used to send notices and other correspondence to persons as described in this section. The failure to notify a person as required in this section is not a basis to challenge the validity of the purpose of the notice including a hearing or a board action.