I dono if this has been thought through. Using the forum template relies on every path in the style sheet to be absolute.
Also, when you do a test send, the email sends but the page redirects to non existent page.
Another point: I have 18,000 members. I told it to send 10 emails per cycle.. So maybe you could explain that better. I then set it to send 9000 per cycle. The screen's gone white and the page has stopped loading, so i'm not sure if i've send the email or not.
I'm sure it's fine for forums with one or two members in, but not mine