Not receiving emails upon submission

I have tries multiple different email for forms and none are being received.

Thanks!
Chris

http://www.newitt.net/outdoorcreationslandscape/testimonials/

http://www.newitt.net/outdoorcreationslandscape/estimate/

http://www.newitt.net/outdoorcreationslandscape/refer-a-friend/

I checked our logs and indeed, the emails to a couple of your addresses have been failing.  The most recent submission does look to have gone through.  Are the notifications still not coming through on your end?