Assuming that your environment is suitably configured, then yes:

mailto:listname-SUBSCRIBE-REQUEST@listhost

This does NOT work for subscribers whose email system does NOT generate a
FROM: field with a name e.g., this would NOT work:

FROM: <user@host>

but this would:

FROM: "Mr. User" <user@host>

At 04:47 10/30/2001 Tuesday, Michael Quinion wrote:
 >Is there a way of sending a blank e-mail message to a special
 >LISTSERV address in order to subscribe to a list, which avoids having to
 >put a SUBSCRIBE line in the body of the message. Perhaps something like
 ><subscribe-listname@domain>?