Yes, you have to run an open mail relay to use this functionality, SELECTIVELY! This is what ucspi-tcp is used for, it sets the environment variable that tells qmail to be an open relay, but only when the connection is from 127.0.0.1, i.e. AOLserver on the local machine. This is configurable.
More instructions: http://Web.InfoAve.Net/~dsill/lwq.html
