If I may add to this thread, the key purpose of a citation is so that later scholars/researchers can verify the source of the information. From that point of view, I believe it highly unlikely that in ten years hence, anyone will be actually able to retrieve a "Museum-L" e-mail message to verify such citations. The best citation therefore, provided that you have a printed copy of the e-mail and keep it with your research papers, is to say: Personal correspondence with the author, John Smith, April 15, 1994 to Jane Doe, Museum-L electronic mail list. --Dean DeBolt, University of West Florida