Jared Kushner. Getty Images On Monday, Jared Kushner's lawyer Abbe Lowell fell for one of the oldest email tricks in the book.

Lowell exchanged sensitive emails with someone he thought was Kushner, but wasn't.

The exchange — which was masterminded by amateur Trump-Russia sleuth Jeff Jetton and executed by a prankster who tweets as @SINON_REBORN — involved emails the prankster said he received from a White House official that contained adult content.

But it didn't take much to fool Lowell — all it took was an email account that displayed Kushner's name.

The prankster wrote to Lowell from the address kushner.jared@mail.com.

Most people would look at that address and assume it isn't legitimate. But chances are, Lowell never even saw the address — most email services display a person's first and last name, not their actual address. And if Lowell emails with Kushner frequently, he wouldn't be surprised to see the name "Jared Kushner" pop up in his inbox.

But Lowell isn't the only one to fall victim to this prank: It recently happened to UK home secretary Amber Rudd, ousted communications director Anthony Scaramucci, homeland Security adviser Tom Bosser (who was fooled by a fake Kushner), and former governor of Utah Jon Hunstman Jr., who was targeted by a fake Eric Trump.

So how can you avoid this trap and make sure your emails are coming from the people you think they're coming from? Here are a few tips: