The Dubai scammers, as posted by Barbara in the scam alert forum, have indeed been operating for some time. However, if you track their IP address, you'll find that they are operating out of the States. TK is a program that allows for subscribers to send multiple emails under different names from the same source, which most people wouldn't bother tracking.

As Barbara warns, if they actually were in Dubai, there would be an "ae" at the end of their email address. These guys are real scums of the earth and will hound you to death once they've got your interest. They're quite believable up to the point that you find out you have to pay for your work visa. I almost got sucked in by them myself due to my strong desire to escape the BS EFL China scene, and the high salary they offer, but fortunately realized they were low life slugs who should be eliminated from the gene pool.

The old adage, "If it seems too good to be true, it probably isn't." is still worth remembering.