I have some issues with two email's on zoho. I keep to get an error like in the title.

Delivery to the following recipient failed permanently:

      paulina.zaleszczak@icieplo.pl

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain  icieplo.pl  by mx.zoho.com . [165.254.167.50].

The error that the other server returned was:
554 5.2.3 MailPolicy violation Error delivering to mailboxes


Can zoho team assist with this or give any clue on how to solve this?

----- Original message -----

DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d= gmail.com ; s=20120113;
        h=mime-version:in-reply-to: references:from:date:message- id:subject:to;
        bh=jhqCxzUMVAvy+jZ7rRxz+ r98NED+lXs8s15WrIdxwj8=;
        b=CevR15dYq5zUoXAny+ PIJ97nnayrTcfDVQnNY83qo4RMOtQa +/x+SKcbT3yC0uZ1Q7
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         P124K+sIYX8+hI5VbqfM+ fpV9HSBHshmZOE97FFOpDNAiyvLtaM r00/hKxRn2fq316rp
         TKvNt90pixJNo30bKtuv/ yFhLciNGy47UoVv1EgdLPNG3hu8VaM BJOtvon2rvmq4U+pq
         p/ SdD77X1FWCwnmB7GrGmvN7IIDZFSl9 PNwgSJUlJmTkNeZHjjXwB7xT5OrCfc vrwAD1
         WR9A==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d= 1e100.net ; s=20130820;
        h=x-gm-message-state:mime- version:in-reply-to: references:from:date
         :message-id:subject:to;
        bh=jhqCxzUMVAvy+jZ7rRxz+ r98NED+lXs8s15WrIdxwj8=;
        b= J20qBFhNB9eLtYAxOeqZtAz4Q8EKxw UhdZj7/mpE5TMfvqmm+ VsCNNmNwglYpAKQ9V
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          3kiKQXndCiLmLUkbsLX9JoM0AMQVak Rsq28G8xxHwG/ Auno4wuAUy0zJ44DRms2YScTR
          PyvEMWNYJYtP3LlRD7e0tf3XBU5IXo X46iXRkqCd30ww+ pPSLvizTlU5COfnv8lEIy+5
         C/T8dHuRbelWv1diwu5nDGO7xC+ 5fGLautavq9WfG1lEGDVZJbdD/HUg+ UwXojw/jBKY
         X3jA==
X-Gm-Message-State: AG10YOQWAVYbA2lrgywzJs+Hs5/ wuYIlXveQIfOp+ I3FIe3HaYUyrkzM6FIwHZA5ENF82q6 0zGpFnsRF1AcE3g==
X-Received: by 10.51.17.34 with SMTP id gb2mr16601917igd.13. 1456316584064;
 Wed, 24 Feb 2016 04:23:04 -0800 (PST)
MIME-Version: 1.0
Received: by 10.79.120.78 with HTTP; Wed, 24 Feb 2016 04:22:44 -0800 (PST)
In-Reply-To: < 710591cc.5843d01.56cd7d8b.987da@o2.pl >
References: < 710591cc.5843d01.56cd7d8b.987da@o2.pl >
From: Paulina Zaleszczak < paulina.zaleszczak@gmail.com >
Date: Wed, 24 Feb 2016 13:22:44 +0100
Message-ID: < CAE7X-Yqp3dGivvyOiBNxZWoaPvKYEa-eA96Qwuj8_3uxgUcEng@mail.gmail.com >
Subject: =?UTF-8?Q?Fwd=3A_oferta=2C_ oferteo_=2D_Open_HR_Monika_ Nowakowska_=2D_z?=
        =?UTF-8?Q?dj=C4=99cia_ produktu?=
To: Paulina Zaleszczak < paulina.zaleszczak@icieplo.pl >
Content-Type: multipart/mixed; boundary= 001a1135ed32b43d24052c8320a4

Can zoho team do something with this or give any clue on how to resolve this?