I am having a problem with my Apache server which runs our website
(off-site), being blocked by our in-site Firebox. The web server
generates email from HTML pages we have set up, but the return-path
(envelope header) is smth like www at www.mysite.org; this appears to be an
invalid address. Subscriptions to our lists are therefore not going to
the list server. Does anyone have any clue what the issue is here?