Well, that's a first for me! 

I never knew you could create a totally anonymous and functioning email address to receive emails (but not send) to avoid spamming to your 'real' email address! 

I had somebody register for my training webinar using an email with the tail '@teleworm.us' so I thought I'd take a look at their website (by sticking www on the front of the URL) and found out that it's a completely FREE service for exactly that purpose! you can fill in a form and verify an account or simply not reveal your own email address and it will receive email to a webpage where its displayed. 

Not sure I'm comfortable with that even though I can see the benefits.