Undelivered Mail Returned to Sender

Undelivered Mail Returned to Sender

Hi Friends,

Please support to fix this case, our users receive RETURNED EMAIL with message below. I wonder if our users send something wrong or Zoho-Mail server has listed to blacklist? 

Please help. Thanks.

Phuc

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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.

 ducviet.-----@vn.panasonic.com, ERROR_CODE :550, ERROR_CODE :5.7.1 <phuc.pham@vinamr.com.vn>... Mail from 135.84.80.217 refused by R type, see http://www.mail-abuse.com/

 

 Received:from HOITPC03 (115.73.222.254 [115.73.222.254]) by mx.zohomail.com

            with SMTPS id 1502777637650766.7618524685712; Mon, 14 Aug 2017 23:13:57 -0700 (PDT)  Message-ID:<017401d3158d$ad8d5890$08a809b0$@vinamr.com.vn>

 Date:Tue, 15 Aug 2017 13:13:54 +0700

 From:<phuc.pham@vinamr.com.vn>

 To:<ducviet.-----@vn.panasonic.com>

 Cc:"Hai Hoang" <hai.-----@vinamr.com.vn>

 Subject:RE: FW: Undelivered Mail Returned to Sender  Content-Type:multipart/alternative;

            boundary="----=_NextPart_000_0175_01D315C8.59F07650"

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