I think it is the case that we cannot change a Dreamhost script.
If you don't want to use your own script, then here's a solution I've used:
- Go to the control panel, in the email section.
- Build a new email forward. For example, "email@example.com" where "blah.com" is your own domain.
- Put your big list of email addresses into the forwarding field. I'm pretty sure you can do a lot of addresses in there.
- Assign "support#blah.com" as your recipient in your call to the mailform script.
Now, the downside to this is that you can't build up a list of recipients DYNAMICALLY, but if all you want is for the same six people to receive this thing, then that's a way that might work for you.