Why did the message from the server end up in spam?

Question

gmail

Here are the message headers. Seems to be normal
User-Agent: Roundcube Webmail/0.9.5
X-Received: by 10.28.56.195 with SMTP id f186mr14584695wma.59.1473080167757; Mon, 05 Sep 2016 05:56:07 -0700 (PDT)
Return-Path:
Mime-Version: 1.0
Authentication-Results: mx.google.com; dkim=pass [email protected]; spf=pass (google.com: domain of [email protected] designates 198.211.127.202 as permitted sender) [email protected]
Content-Transfer-Encoding: 8bit
Message-Id: <[email protected]>
X-Sender: [email protected]
Dkim-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=forestlab.pro; s=mail; h=Message-ID:From:Date:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:To; bh=/eRjn3akq+WpwQJBKoaRUrV9QyWQQ1UQ9kwEa+Ln0LA=; b = jVyv9jju6le + ZfVSHBV7BHYHcD8RCRK4voaIyLZ6e5AA63IIEdFg6WR8mqj55WwOLfCXJJbOrVB5SAZpEmMmfoaqk7F9KbY7Xy6KENE53vuk5qFBj8bfq88 / mWeU5zgUEmYxVZirA4dh0GvWtN2s5e6cSwLMcO44opgQFT3TCWY = ;
Content-Type: text/plain; charset=UTF-8; format=flowed
Received-Spf: pass (google.com: domain of [email protected] designates 198.211.127.202 as permitted sender) client-ip=198.211.127.202;
Delivered-To: [email protected]
X-Php-Originating-Script: 0:rcmail.php
Received: by 10.25.144.205 with SMTP id s196csp115643lfd; Mon, 5 Sep 2016 05:56:07 -0700 (PDT)
Received: from 198.211.127.202 ([198.211.127.202]) by mx.google.com with ESMTPS id cn10si24818075wjb.185.2016.09.05.05.56.07 for (version=TLS1_2 cipher=AES128-SHA bits=128/128); Mon, 05 Sep 2016 05:56:07 -0700 (PDT)
Received: from admin by 198.211.127.202 with local (Exim 4.82) (envelope-from ) id 1bgtRX-0000pE-2B for [email protected]; Mon, 05 Sep 2016 12:56:07 +0000
test

Answer 1

Your IP is blacklisted. Or rather here:
www.abuseat.org/lookup.cgi?ip=198.211.127.202