mail marked as spam

mail marked as spam

I have problem that my mails are often marked as spam. I'm using my mail account through gmail.  Below example:

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.

xxxx@vrk.fi , ERROR_CODE :554, ERROR_CODE :5.7.1 This email from IP 135.84.80.217 has been rejected. The email message was detected as spam.


 Received:from  mail-ua0-f173.google.com  ( mail-ua0-f173.google.com  [209.85.217.173]) by  mx.zohomail.com
        with SMTPS id 1492093460309898. 1351661274878; Thu, 13 Apr 2017 07:24:20 -0700 (PDT)
 Message-ID:<xxxxx @mail.gmail.com >
 Date:Thu, 13 Apr 2017 09:24:18 -0500
 From:Jani Kajala < info@kajala.com >
 To:VRK KaPA-palvelupiste < xxxx @vrk.fi >
 Subject:Re: Tietoturvapoikkeama
 Content-Type:multipart/mixed; boundary= 001a1135bb6ea20505054d0d144c