My patches contain an optional tcl script that qmail could use to return a more meaningfull response when e-mail responses to notifications are not implemented.
Respond to an OpenACS notification and you'll receive a qmail error message. With the optional tcl script in place you'd receive a message explaining that responses to the discussion go through the openacs.org web site.
So, the patches don't change the current design of the notifications. In order to switch the acceptance of e-mail responses with a parameter, AOLServer would have to handle the incoming responses in both cases.
/Bart
