I have pointed the MX records correctly:

I have one user email setup, no groups.

I cannot send or receive email. I get the following autoresponse from the mailer.

This message was created automatically by mail delivery software. 
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

me@mysite.com INVALID_ADDRESS, ERROR_CODE :550, ERROR_CODE :Verification failed for < adam@mrmiserable.co.uk > 
            No Such User Here 
            Sender verify failed 

Received:from mail.zoho.com by mx.zohomail.com 
    with SMTP id 1483647952648356.96467164855414; Thu, 5 Jan 2017 12:25:52 -0800 (PST) 
Message-ID:<159704f2705.126e1 9d64417253.8717567468665241480@mrmiserable.co.uk > 
Date:Thu, 05 Jan 2017 12:25:52 -0800 
From:adam < adam@mrmiserable.co.uk > 
User-Agent:Zoho Mail 
To:"adam" <me@mysite.com > 
Subject:testing 
Content-Type:multipart/alternative; 
    boundary="----=_Part_1280121_1243092025.1483647952646"

What am I missing????