Some mailing lists that I susbscribe to have recently gotten spam that
looks like this:
magnetic synchronous motor water pump [ "nhhuajian"
<nhhuajian@2888.com> ]
The mailing lists discuss the development of the Debian GNU/Linux
operating system. The readers are unlikely to be interested in
magnetic synchronous motor water pumps.
I hear that unsolicited commercial email is actually illegal in some
states.