On Wed, 16 Sep 1998 11:37:09 -0700, Liz Marr <[log in to unmask]> wrote:

>Some time ago, I read about a Listserv feature (could be 1.8d) that allows a
>person to sub or unsub to a list by simply sending a message to a hashed
>address that includes the listname - something like:
>
>[log in to unmask]

Another excerpt from the forthcoming 1.8d Release Notes:

***********************************************************
* Support for listname-subscribe-request, etc., mailboxes *
***********************************************************

Version 1.8d now supports the following generic -request mailboxes for lists:

listname-subscribe-request@...
listname-signoff-request@...
listname-unsubscribe-request@...

(where "listname" is the name of the list in question). Mail sent to these
addresses will be interpreted as explicit SUBSCRIBE, SIGNOFF, or UNSUBSCRIBE
commands, respectively, for the list in question, regardless of the text
contained in the body of the mail message (which will simply be discarded).

Unix and VMS hosts will need to add appropriate aliases (as usual) to sendmail
and PMDF, respectively, in order to activate this functionality. Windows
installations using either the SMTPL.EXE "listener" or LSMTP have this
functionality activated automatically.