In college, I had a URL in my email signature, and the website was about etiquette in emails. I did this because I had to frequently communicate with a person who typed in all caps, and I hoped that he'd read it at some point. But anyways it wasn't a well-known domain, nor was it one that I had registered myself.

And then, somebody sent me an email asking what kind of sick sense of humor I had, and it turned out that the link now went to a hardcore porn website. Not the best link to have in your email when you're using it to try to find a job.

Thinking about it now, I wouldn't be surprised if it was a prank by somebody who knew me.

I always hover over the email address if there is one as a mailto: link. Occasionally, I'll see it pointing to another person, whoever helped them set up their inbox without explaining hyperlinks.