Reach Hundreds of DMIA Members ? Whenever You Need Them DMIA operates two Listservs, one exclusively for company owners and executives (principals), and a Source Listserv for all employees of DMIA member companies. What is a Listserv? It's an automated, broadcast email service. Once you are subscribed, you can send one email to the list address and within seconds it will reach the entire list of hundreds of subscribers. Topics on the Principals Listserv range from potential vendors, software companies, hiring, and more. The Source Listserv deals primarily with source requests and sales and marketing topics. If you are a DMIA member and would like to be added to the Source Listserv or if you are a DMIA member company principal interested in either Listserv, send an to join.