How did they link a domain I own to my gmail email addres?

I just received an email from findsway.com: <i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i> Hi Jonathan Someone at Picutive has a crush on you !<p>Your admirer and 3 of your Facebook friends are using Sway to anonymously meet new people.<p><i></i><i></i><i></i><i></i><i></i><i></i><i></i> Picutive.com is my domain (it's not very popular). I have the only email address associated at that domain, so it's obviously a scam, but how did they link Picutive to my email address?