(3) Unless otherwise provided in the partnership agreement or agreed between the sender and recipient, an electronic transmission is delivered to a person for purposes of this chapter and the partnership agreement when it enters an information processing system that the person has designated for the purpose of receiving electronic transmissions of the type delivered, so long as the electronic transmission is in a form capable of being processed by that system and such person is able to retrieve the electronic transmission. Whether a person has so designated an information processing system is determined by the partnership agreement or from the context and surrounding circumstances, including the parties' conduct. An electronic transmission is delivered under this section even if no person is aware of its receipt. Receipt of an electronic acknowledgement from an information processing system establishes that an electronic transmission was received but, by itself, does not establish that the content sent corresponds to the content received. This chapter shall not prohibit one or more persons from conducting a transaction in accordance with chapter 12A of this title so long as the part or parts of the transaction that are governed by this chapter are documented, signed and delivered in accordance with this subsection (a) or otherwise in accordance with this chapter. This subsection (a) shall apply solely for purposes of determining whether an act or transaction has been documented, and the document has been signed and delivered, in accordance with this chapter and the partnership agreement.