In order to comply with carrier and regulatory standards all SMS marketing plans have both a maximum number of daily recipients and a maximum list size. For example, a golf course could have a "member" list with 500 subscribers and a "board" list with 20 subscribers. If the course sent a message to both lists on the same day, the total daily recipients would be 570. The cost for sending both messages would be $5.70. The course could send additional messages that day to other lists as long as the total recipients stays below the maximum number of daily recipients.