Curious about maximum email forwarders

I haven’t been able to determine the maximum number of email forwarders that I can create in my $9.95/month hosting plan. The reason I ask is that we are planning to add about 1,000 email forwarders (no catch-alls) to one of my domains. Is this allowed? If so, would it create any issues? Users will be required to comply with anti-spam rules and an abuse policy consistent with Dreamhost requirements of course.