To unsubscribe from pen-geos, send mail to majordomo@lists.grot.com
and put "unsubscribe pen-geos" in the message body. If you're getting
the digest version, then put "unsubscribe pen-geos-digest" in the
message body.
BTW, these instructions are included in the header of each pen-geos
message (look for "X-instruction:"). However, the message header may
not be visible in some mail programs. I think that AOL supresses
all header info except to, from, date, and subject.
-Brian