Transactional or relationship message

Under the CAN-SPAM Act, a transactional or relationship message is:
 * [A]n electronic mail message the primary purpose of which is--
 * (i) to facilitate, complete, or confirm a commercial transaction that the recipient has previously agreed to enter into with the sender;
 * (ii) to provide warranty information, product recall information, or safety or security information with respect to a commercial product or service used or purchased by the recipient;
 * (iii) to provide--
 * (I) notification concerning a change in the terms or features of;
 * (II) notification of a change in the recipient's standing or status with respect to; or
 * (III) at regular periodic intervals, account balance information or other type of account statement with respect to,
 * a subscription, membership, account, loan, or comparable ongoing commercial relationship involving the ongoing purchase or use by the recipient of products or services offered by the sender;

(iv) to provide information directly related to an employment relationship or related benefit plan in which the recipient is currently involved, participating, or enrolled; or (v) to deliver goods or services, including product updates or upgrades, that the recipient is entitled to receive under the terms of a transaction that the recipient has previously agreed to enter into with the sender.”