California Code, Civil Code - CIV § 1633.15

(a) Unless the sender and the recipient agree to a different method of sending that is reasonable under the circumstances, an electronic record is sent when the information is addressed properly or otherwise directed properly to the recipient and either (1) enters an information processing system outside the control of the sender or of a person that sent the electronic record on behalf of the sender, or (2) enters a region of an information processing system that is under the control of the recipient.

(b) Unless the sender and the recipient agree to a different method of receiving that is reasonable under the circumstances, an electronic record is received when the electronic record enters an information processing system that the recipient has designated or uses for the purpose of receiving electronic records or information of the type sent, in a form capable of being processed by that system, and from which the recipient is able to retrieve the electronic record.

(c) Subdivision (b) applies even if the place the information processing system is located is different from the place the electronic record is deemed to be received under subdivision (d).

(d) Unless otherwise expressly provided in the electronic record or agreed between the sender and the recipient, an electronic record is deemed to be sent from the sender's place of business and to be received at the recipient's place of business or, if the recipient is an individual acting on his or her own behalf, at the recipient's place of residence.  For purposes of this subdivision, the following rules apply:

(e) An electronic record is received under subdivision (b) even if no individual is aware of its receipt.

(f) Receipt of an electronic acknowledgment from an information processing system described in subdivision (b) establishes that a record was received but, by itself, does not establish that the content sent corresponds to the content received.

(g) If a person is aware that an electronic record purportedly sent under subdivision (a), or purportedly received under subdivision (b), was not actually sent or received, the legal effect of the sending or receipt is determined by other applicable law.  Except to the extent permitted by the other law, this subdivision may not be varied by agreement.