Big names labeling my email as spam

[wallmapu]

I have 10/10 score from mail-tester.com, so I don't know what else to do.

Headers from a mail sent from a mail account created on sentora to gmail:

Code:

Delivered-To: juanito@gmail.com
Received: by 10.79.27.130 with SMTP id b124csp1801309ivb;
        Tue, 28 Jul 2015 11:37:34 -0700 (PDT)
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        Tue, 28 Jul 2015 11:37:34 -0700 (PDT)
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Date: Tue, 28 Jul 2015 15:37:31 -0300
From: pedro Matus <pedro@partita.cl>
To: juanito@gmail.com
Subject: (sin asunto)
Message-ID: <9dda0c999cd7618c869a375da49bef32@partita.cl>
X-Sender: pedro@partita.cl
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