This is often a good security check on a company.

Suppose you think you're dealing with a sensible company based in Liverpool and their web address is registered in the Ukraine!

Just type the web address into the program and click to find the domain.

The example shows a lookup for www.telepolis.com. We are receiving vast amounts of filthy spam which points to an address on this web domain, so we make no apologies for giving them this publicity.

As you can see, it is hosted on www.wanadoo.es. So if you're getting spam from this source, why not write a polite letter, asking them to stop it.