Many LISTSERV operations are easily performed through email. We'll use the fictional list FICTIONAL-L in our examples below. You should replace all occurrances of the string "FICTIONAL-L" with the list you are interested in.
To add yourself to a list, send a piece of email to
listserv@lists.ufl.edu
with the line
subscribe (listname) (your first name) (your last name)
e.g.:subscribe FICTIONAL-L Jane Doe
To remove yourself from a list, send a piece of email to
listserv@lists.ufl.edu
with the line
unsubscribe (listname)
e.g.:unsubscribe FICTIONAL-L