これを踏まえて、私もあまり英語得意じゃないけど。

Dear who may concern.

I'm afraid to say that one of your client is running possible botnet.
The domain is 'cormieri.com'.

There are many spam mail promoting Web sites under the domain
posted from DSL, cable or dialup network in various regions of the world.

Its DNS is served by hosts also in DSL, cable, or dialup network with
frequently change through worldwide,
and Web sites itself is served by DSL, cable or dialup, too.

I think it's common characteristic on botnet.

The www server under the domain holds dating site so-called "deai-kei",
which cause many social problem in general.

I hope you treat the issue appropriatly.

Regards.