Mail lists are labels attached to patrons. They provide the ability to target market to a group of patrons. To illustrate, a "musicals" mail list could be created for all patrons who like musical productions. Use this list to send personalized letters, print labels, create reports or ask for donations. Mail lists can be manipulated in many ways. For example, you could use the "musicals" mail list to create another mail list that includes everyone on the musicals mail list but excludes people who have purchased tickets to the current musical.