DOMAIN_NOT_RESOLVED and can't get and send some mails

DOMAIN_NOT_RESOLVED and can't get and send some mails


Good day, we have some trouble.
fisrt of all we cant send message to  Zhark**@sta.bryansk.ru  gayduko**@sta.bryansk.ru and cant receive mails from it, we getting mail
-----Original Message----- 
Sent: Thursday, June 8, 2017 5:15 PM
Subject: Mail Delivery Status Notification (Delay)

This message was created automatically by mail delivery system.

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

The original message was received at Thu, 08 Jun 2017 16:15:14 +0200  from  zayts**@ganex-group.com [ zayts**@ganex-group.com]

    ----- The following addresses had fatal errors -----   
   [Status: DOMAIN_NOT_RESOLVED, Address: < gayduko**@sta.bryansk.ru>, DOMAIN_NOT_RESOLVED, Status: DOMAIN_NOT_RESOLVED, Address: < zhark**@sta.bryansk.ru>, DOMAIN_NOT_RESOLVED]

Message will be retried for 4 more day(s)

    ----- Transcript of session follows -----   

Received:from DESKTOP5G5DF9Q (213.160.156.125 [213.160.156.125]) by mx.zoho.eu
        with SMTPS id 1496928603268780.9978192058411; Thu, 8 Jun 2017 15:30:03 +0200 (CEST)  Message-ID:<009201d2e05b$568fb4f0$03af1ed0$@ganex-group.com>
Date:Thu, 8 Jun 2017 16:30:04 +0300
From:"Alexey Zaytsev" < zayts**@ganex-group.com>  To:'Жарков Алексей' < Zhark**@sta.bryansk.ru>,
        'Гайдукова Елена Анатольевна' < gayduko**@sta.bryansk.ru>
Subject:
Content-Type:multipart/mixed;
        boundary="----=_NextPart_000_0093_01D2E074.7BDE7390"



And second bug,  in**@trans-imperia.com  v.subo**@bm.com.ua, from this mails we dont get message, but send mails to it successful.


On 
  • Troubleshoot
Check it http://clip2net.com/s/3LfEkGg  

We wrote twice in support - there is no answer. Please help to solve the problem.

MX records at the domain are present, domains exist


Can you help with this?
P.S. we migrate from Yandex mail