[toaster] Port 587

[Maxwell]

Hi there - I recently setup a new mail server based around the Toaster ( http://shupp.org/toaster/ ) to great success.   I just have one main issue at this point - many of our users were set to port 587 due to their home ISP blocking port 25.  However, the toaster does not seem to respond to requests on this port.  I'm sure this is relatively easy - but can someone instruct me on how to have SMTP respond to requests on port 587 as well as 25?

Thanks!