The ZFC mailing list (ZFC@Torrens.org) is a mailing list without any defined subject: members are linked by past internet experience. In general, members are older and are long term computer users, mostly (but not exclusively) of RISC OS.
There is a site for members which gives information.
However it is a list that allows plain text only: any email sent to it with either html or other attachment will not be accepted.
To join the list you need to follow a few simple steps (which are very effective at keeping spammers off the list!):
The email ideally should be empty: subject and body contents are ignored (so there's no point in explaining why you want to join the list!). In particular, it won't work unless it's plain text - so make sure html is turned off.
It is very important that you check that your email program responds to the correct address here: some programs break the reply address at the +, - or = sign. This will not work!
Document URI: www.torrens.org/Lists/ZFC/index.html