What is "listserv"

n. (context Internet English) A type of electronic mailing list, allowing for distribution of email to many subscribers.

The term Listserv (written by the registered trademark licensee, L-Soft International, Inc., as LISTSERV) has been used to refer to electronic mailing list software applications in general, but is more properly applied to a few early instances of such software, which allows a sender to send one email to the list, and then transparently sends it on to the addresses of the subscribers to the list.

The original Listserv software, the Bitnic Listserv (also known as BITNIC LISTSERV) (1984–1986), allowed mailing lists to be implemented on IBM VM mainframes and was developed by Ira Fuchs, Daniel Oberst, and Ricky Hernandez in 1984. This mailing list service was known as Listserv@Bitnic (also known as LISTSERV@BITNIC) and quickly became a key service on the BITNET network. It provided functionality similar to a UNIX Sendmail alias and, as with Sendmail, subscriptions were managed manually.

In 1986, Éric Thomas developed an independent application, originally named "Revised Listserv" (also known as "Revised LISTSERV"), which was the first automated mailing list management application. Prior to Revised Listserv, email lists were managed manually. To join or leave a list, people would write to the human list administrator and ask to be added or removed, a process that only got more time-consuming as discussion lists grew in popularity.

By 1987, the users of the Bitnic Listserv had migrated to Thomas' version.

Listserv was freeware from 1986 through 1993 and is now a commercial product developed by L-Soft, a company founded by Listserv author Éric Thomas in 1994. A free version limited to ten lists of up to 500 subscribers each can be downloaded from the company's web site.

Several other list management tools were subsequently developed, such as Lyris ListManager in 1997, Sympa in 1997, GNU Mailman in 1998.