I'm trying out to figure what is the syntax for unsubscription. I looks if I use the code from http://www.hartzler.net/smartlist/SmartList-FAQ.html#Section_3.2 that users have to say:
Subject: X-Command: unsubscribe , right?
It also applies to the message body, right?
Perhaps you are a little bit confused, X-Command: is for the list admins. Users would subscribe or unsubscribe the usual way.
BTW, if you use rc.local.r00 to use X-Command in the body, it just mean you can write:
Subject: whatever From: whatever <- blank line separating headers and body. X-Command: whatever <- first line of body.
instead of
Subject: whatever From: whatever X-Command: whatever <- still a header line.