Yes we have been looking into this,  you can check on the community thread forum where several members are reporting problems.. here :
http://market.renderosity.com/mod/forumpro/showthread.php?thread_id=2675015

It seems to be a problem for some people and not others we are looking into getting some email providers to ensure we are whitelisted.. And there are known issues with some like AOL and Hotmail

Danny O'Byrne  http://www.digitalartzone.co.uk/

"All the technique in the world doesn't compensate for the inability to notice" Eliott Erwitt