I am not receiving all emails, and not all are being sent

I am not receiving all emails, and not all are being sent

Hello,

I signed up for Zoho just over a week ago and I'm not receiving or sending all emails. I have no idea which one's have been sent or what I've missed as there is no notification. I have an online email form at my website and I'm not receiving any emails from there even though I was at the GoDaddy server. This is extremely important that I have 100% success rate on emails, and I should atleast get a a bounce back warning if an email isn't sent or received. Please help asap.

Thanks,
Charlie