[Plugin: Contact Form 7] mail not working

hi,

my cc and bcc works fine but when I use my TO address in the mail section my mail goes undelivered.
I have my mail setup with google apps and this is the account causing the problem.
The mail doesn’t appear in spam. Is there a specific setting I need to allow the mail receieve thru properly?

http://ww.wp.xz.cn/extend/plugins/contact-form-7/