[Exim] a spammer

This one may be a little odd. Here's the situation:

A significant amount of spam comes from email addresses with domains like
"2die4.com", "myself.com", "soon.com", and other idiotic names. These are
all owned by inamecorp.com and serviced by their DNS servers (165.251.1.2
and .3). Smtp rejects always go to mail-intake-1.iname.net, where they're
rejected.

What I'm wondering is, is there a way to A) detect that an incoming 'from'
address is served by the spamcorp dns servers, and reject it? and B) send
the reject straight to the inamecorp.com postmaster?

---
Dennis Taylor
---
Don't worry about people stealing your ideas. If your ideas
are any good,
you'll have to ram them down people's throats.