Massachusetts Law About Subpoenas
MRCP 45: Subpoenas
Trial Court Rule IX: Uniform Rules on Subpoenas to Court Officials
While Rule 45 provides that service can be made by "any person who is not a party and is not less than 18 years of age," service can also be made by a Deputy Sheriff or Constable.
Your Guide to Subpoenas-What they are, How they can help you, and How to serve them, Mass. Legal Services. A simple guide for those who want to serve a subpoena, includes directions and forms.
Massachusetts Practice v. 49 (Discovery), 2nd ed., Thomson/West, 2008 with supplement. Section 8:7: Taking depositions in Massachusetts in out-of-state cases; Sections 8:70-8:72: Application for order, Affidavit in support of application for order, and Order for taking deposition in Commonwealth for proceeding in tribunal outside Commonwealth.