Can send but can't receive emails

Can send but can't receive emails

Hi Zoho

I need your help urgently.

Firstly we recived a message about one of our colleagues getting blocked on his account. I'm not to sure if this is related to not recieving emails or not.

However now our main issue is that we can't recieve any emails at all. We recieved a message about MX records and anyone sending message to our acc recieve this message. I have blocked out contact details for obvious reasons.

*******
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. 

X@X.co.uk Invalid Address, ERROR_CODE :550, ERROR_CODE :unknown user 


Received:from mail.zoho.com by mx.zohomail.com 
    with SMTP id 1410194479981893.384559226801; Mon, 8 Sep 2014 09:41:19 -0700 (PDT) 
Message-ID:<14856241b3a.11cf0 368e254267.4182962022302600221@wazegroup.co.uk > 
Date:Mon, 08 Sep 2014 17:41:19 +0100 
From:Sam <XXX > 
User-Agent:Zoho Mail 
To:"XXX" <XXX >
Subject:Waze 
Content-Type:multipart/alternative; 
    boundary="----=_Part_331250_1825564884.1410194479915"
anyone sending message to our acc recieve this message. I have blocked out contact details for obvious reasons.

*******

Please help Zoho as we are expecting very important emails.

Thanks