cant send email to [email protected]

Everytime I hit send to send message, I recieved undeliverable
message, and the addresss of the sender was nobody@
I just want to reach them but it's hard!!! any idea why when I make
vcd slideshows for about 20 pictures it says I reach more than 700 mb
I cant create a vcd when I hit the create??? thanks.....
P.S any idea how can I reach them what alternative email address they
have???