The latest version of LISTSERV(R) 1.8d already has an online interface
to many common commands, both from list-owner and subcriber perspectives.
Furthermore, posting (NOT using email) can be done online via that HTTP
interface.
Finally, this version supports RFC822 header only subscrption e.g.,
mailto:[log in to unmask]
i.e, no SUBJECT: or body-of-text required.
With a receiver's compliant mail user agent, you may generate
body-of-text commands by using the <per-cent>20 as a single blank.
mailto:[log in to unmask]