Give spam !!! And more !!!

I really need a lot of spam!

No, I'm not crazy. And now you will understand everything.
The amount of spam in our office, as in most of the others, has already exceeded the limits of reasonable and the management has ordered to fight!
Antispam offer a lot and different. Which one is good, and which one will work as expected, is just to be chosen.
One of the implementation features is that anti-spam will work on Exchange 2007. This means that a simple filter for an SMTP gateway (as many anti-spam tools work) will not be enough. Why? It turned out that Exchange 2007 ignores X-Spam-Status tags. This showed the introduction of Spam Defense 1024, the only decent antispam, in my opinion.

Well, back to the formulation of the problem.

Testing a dozen anti-spam on a working server is not good, it’s not for me to explain to you.
For testing, it was decided to allocate a separate server in a separate domain, and in the virtual machine with a rollback to the previous snapshot after each installed anti-spam.
The whole problem is that no one of the spammers really knows about the new domain, so it’s impossible to check antispam, except to look at its windows.
Therefore, question number 1. How to send hordes of spam letters to several addresses from a new domain?
Question number 2. Colleagues admins, tell me, how did you overcome spam?

As a result, at the end of the experiment, I promise to share the results.