Cal. Bus. & Prof. Code § 17529.4
(a) It is unlawful for any person or entity to collect electronic mail addresses posted on the Internet if the purpose of the collection is for the electronic mail addresses to be used to do either of the following:
(b) It is unlawful for any person or entity to use an electronic mail address obtained by using automated means based on a combination of names, letters, or numbers to do either of the following:
(c) It is unlawful for any person to use scripts or other automated means to register for multiple electronic mail accounts from which to do, or to enable another person to do, either of the following: