укоротил.
Заодно поправил smtp banner.

на мэйлру по-прежнему отлуп на стадии отправки (письма долбятся туда по графику).
сообщение от гугля изменилось:

Delivered-To: toxarbk@gmail.com
Received: by 10.114.201.133 with SMTP id ka5csp231915ldc;
        Tue, 1 Apr 2014 12:57:09 -0700 (PDT)
X-Received: by 10.180.19.130 with SMTP id f2mr22591931wie.6.1396382228786;
        Tue, 01 Apr 2014 12:57:08 -0700 (PDT)
Return-Path: <toxaxyz@realbiker.ru>
Received: from realbiker.ru??????????????????????????????????? (realbiker.ru. [144.76.174.115])
        by mx.google.com with ESMTPS id v2si29589860eel.316.2014.04.01.12.57.08
        for <toxarbk@gmail.com>
        (version=TLSv1 cipher=RC4-SHA bits=128/128);
        Tue, 01 Apr 2014 12:57:08 -0700 (PDT)
Received-SPF: softfail (google.com: best guess record for domain of transitioning *@realbiker.ru does not designate 144.76.174.115 as permitted sender) client-ip=144.76.174.115;
Authentication-Results: mx.google.com;
       spf=softfail (google.com: best guess record for domain of transitioning *@realbiker.ru does not designate 144.76.174.115 as permitted sender) smtp.mail=*@realbiker.ru;
       dkim=neutral (no key for signature) header.i=@realbiker.ru
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=realbiker.ru; s=mail;
  h=Message-ID:From:Date:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:To; bh=76RLYXNuL0JSuQjmBl/+sNzeWP6dwvKrNzYaaKv3nFU=;
  b=G7+pGsTMxixdwO8AJhaJaebAmHH3zZXQt9DzNx/3BfcoTi5Z5FmZ7RcyEFMfXdBQs6rCe+kmoUfU65LsfVi4LA==;
Received: from admin by realbiker.ru with local (Exim 4.72)
  (envelope-from <*@realbiker.ru>)
  id 1WV4o0-0007QZ-8d
  for toxarbk@gmail.com; Tue, 01 Apr 2014 21:57:08 +0200
To: toxarbk@gmail.com
Subject: =?UTF-8?Q?=D1=82=D0=B5=D1=81=D1=82=20smtp=20banner=20ok?=
X-PHP-Originating-Script: 0:rcmail.php
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8;
format=flowed
Content-Transfer-Encoding: 8bit
Date: Tue, 01 Apr 2014 23:57:08 +0400
From: *@realbiker.ru
Message-ID: <a80ef946ad86bfff450aab23bd44b9d7@realbiker.ru>
X-Sender: toxaxyz@realbiker.ru
User-Agent: Roundcube Webmail/0.9.4

тест smtp banner ok