Two domains, one MAIL server, how to make friends with the Google spam filter?

Question

Google

On one server there are two projects on different domains:
nashitut.ru
energosi.ru
After a week of wandering around the forums and Google documentation, I set it up as follows:
SPF, DKIM, DMARC records - Google all of them are checked and the verdict is PASS (both domains) .
MX records for both domains are common - mail.energosi.ru
PTR record - mail.energosi.ru
mxtoolbox - all parameters are marked with green ticks.
However, Google mail puts letters in SPAM, although all checks have been passed:

Delivered-To: [email protected]
Received: by 10.194.121.230 with SMTP id ln6csp1169wjb;
        Sun, 29 Jun 2014 21:58:30 -0700 (PDT)
X-Received: by 10.180.90.113 with SMTP id bv17mr27002219wib.31.1404104310839;
        Sun, 29 Jun 2014 21:58:30 -0700 (PDT)
Return-Path: <[email protected]>
Received: from mail.energosi.ru ([2a01:4f8:202:103::2])
        by mx.google.com with ESMTPS id dr4si8380587wib.100.2014.06.29.21.58.30
        for <[email protected]>
        (version=TLSv1.2 cipher=RC4-SHA bits=128/128);
        Sun, 29 Jun 2014 21:58:30 -0700 (PDT)
Received-SPF: pass (google.com: domain of [email protected] designates 2a01:4f8:202:103::2 as permitted sender) client-ip=2a01:4f8:202:103::2;
Authentication-Results: mx.google.com;
       spf=pass (google.com: domain of [email protected] designates 2a01:4f8:202:103::2 as permitted sender) [email protected];
       dkim=pass [email protected];
       dmarc=pass (p=NONE dis=NONE) header.from=nashitut.ru
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nashitut.ru; s=dkim;
 h=Date:Message-Id:Content-type:MIME-Version:Reply-To:From:Subject:To; bh=U9El/uXNszdSDC6ZtOGnbW4VVcBhFdbyZaFRMHo7MZU=;
 b=kmaeqMw5skqOPxue0zodVEkO9xTr2fJxclfCu752EVZEQyFTP0nTaQsdVA8qTL/wb005DO1G6gIMOncZG5NJBLmf0mE3GTZ/1FIfoAoC0d8Lw/3HKzjMUTBx6Ell3f0eTVAR0c3qT4lNWS0G21f9EMTN3bJia4ICNQarjGZxfbU=;
Received: from nashitut by mail.energosi.ru with local (Exim 4.80)
 (envelope-from <[email protected]>)
 id 1X1Tfi-0004PT-FY
 for [email protected]; Mon, 30 Jun 2014 08:58:30 +0400
To: [email protected]
Subject: =?utf-8?B?0KDQtdCz0LjRgdGC0YDQsNGG0LjRjyDQvdCwINC/0L7RgNGC0LDQu9C1INCd0LDRiNC40KLRg9GCIQ==?=
X-PHP-Originating-Script: 500:SendMail.php
From: =?utf-8?B?0J3QsNGI0LjQotCj0KI=?= <[email protected]>
Reply-To: [email protected]
MIME-Version: 1.0
Content-type: text/html; charset=utf-8
Message-Id: <[email protected]>
Date: Mon, 30 Jun 2014 08:58:30 +0400

Maybe I'm missing something?
mxtoolbox:

Connecting to 148.251.46.4

220 mail.energosi.ru ESMTP Exim 4.80 Mon, 30 Jun 2014 12:20:42 +0400 [889 ms]
EHLO MXTB-PWS3.mxtoolbox.com
250-mail.energosi.ru Hello mxtb-pws3.mxtoolbox.com [64.20.227.133]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-AUTH PLAIN LOGIN CRAM-MD5
250-STARTTLS
250 HELP [749 ms]
MAIL FROM: <[email protected]>
250 OK [749 ms]
RCPT TO: <[email protected]>
550 relay not permitted [764 ms]

MXTB-PWS3v2 4664ms

Here is a telnet from the server to Google:

data
354  Go ahead l45si14610568yhk.154 - gsmtp
Hellow my friend! How are you?
reply me plesae...
.
550-5.7.1 [148.251.46.4      12] Our system has detected that this message is
550-5.7.1 likely unsolicited mail. To reduce the amount of spam sent to Gmail,
550-5.7.1 this message has been blocked. Please visit
550-5.7.1 http://support.google.com/mail/bin/answer.py?hl=en&answer=188131 for
550 5.7.1 more information. l45si14610568yhk.154 - gsmtp
Connection closed by foreign host.

It can be seen there is trouble, but it is not clear where to dig (

Answer 1

Have you studied recommendations for the implementation of mass mailings ?
Troubleshooting with mass mailings
I also advise you to study the domain for openrelay

Answer 2

Send a blank email. If it didn’t get into spam, then look at the structure and formatting of the letter.