Is there a difference between LISTSERV® and an email list?

Yes! LISTSERV is a software application that runs opt-in email lists, including discussion groups, newsletters, announcement lists and email marketing campaigns – in other words, all types of permission-based mailing lists. So, LISTSERV is not an email list. It is a program for email lists.

For more details about the proper use of the term LISTSERV, visit:
http://www.lsoft.com/corporate/trademark.asp