Can't receive messages but can send them?

Can't receive messages but can send them?

Hello, I just signed up for an account and when I am logged into zoho I can send an email message and it will be received on the other end...however if I try and reply to that message...the response is not recieved by my inbox.  I get an error that message delivery failed.  As well...I can not send a message to my address either.  I will get the same error.  Did I do something wrong in setup?