ERROR_CODE :573

ERROR_CODE :573

Hi, i have a problem when send mail from my any mail@my domain. (v-e.com.ua) to any mail on domain optima.com.ua. When i send to gmail. all ok, when send from gmail to this mail - all ok. 
I get error to in box:

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. 

trei@optima.com.ua , ERROR_CODE :573, ERROR_CODE : admin@v-e.com.ua  unknown user account 

Received:from mail.zoho.eu by mx.zoho.eu 
    with SMTP id 1496662898482493.1366455132346; Mon, 5 Jun 2017 13:41:38 +0200 (CEST) 
Message-ID:<15c780f772a.aef bd34e51787.3329281393165584775@v-e.com.ua
Date:Mon, 05 Jun 2017 14:41:38 +0300 
From:Viktor Yakumec < admin@v-e.com.ua
User-Agent:Zoho Mail 
To:"trei" < trei@optima.com.ua