This is via Ian Fairclough on the Metadata Librarians list:
MARCEDIT-L, a Listserv(R)-hosted list, has recently been made available
for those wishing to ask (or answer) questions about MarcEdit. Also, if you are organizing a MarcEdit workshop, you may use the list to promulgate information (including local arrangements).
You can subscribe to MARCEDIT-L at https://listserv.gmu.edu/cgi-bin/wa?SUBED1=marcedit-l&A=1
Or send an e-mail to: LISTSERV@LISTSERV.GMU.EDU
with the text
plus a forename and surname.
Once subscribed, you can send e-mail to the list at MARCEDIT-L@LISTSERV.GMU.EDU
MARCEDIT-L list owners are Terry Reese, Nathan Putnam, and [Ian Fairclough].
This address MARCEDIT-Lemail@example.com will send an e-mail, not to the list, but to the current listowners, whoever they may be. (Incidentally: You can reach any Listserv(R) list owners using the same formula: Add -request after the name of the list in its e-mail