I ran a Diagnostics on mxtoolbox.com and shows a SMTP Connect failure
Here's the notification sent by Gmail:
This is an automatically generated Delivery Status Notification
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
Delivery to the following recipient has been delayed:
cbustamante@santiagosystems.com
Message will be retried for 2 more day(s)
Technical details of temporary failure:
The recipient server did not accept our requests to connect. Learn more at
https://support.google.com/mail/answer/7720
[(0)
santiagosystems.com
. [74.201.155.96]:25: socket error]
----- Original message -----
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=
gmail.com
; s=20120113;
h=mime-version:date:message-
id:subject:from:to:content-
type;
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MIME-Version: 1.0
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Date: Fri, 10 Jul 2015 09:59:23 -0300
Message-ID: <CA+HZafK__B5aVWtPJ=1L6-OzXp=
YyMJ6FxmT3QUWcLzFKgdLEQ@mail.gmail.com
>
Subject: TEST 21
From: Carlos Bustamante <
cbustamantes@gmail.com
>
To: Santiago Systems <
cbustamante@santiagosystems.com
>
Content-Type: multipart/alternative; boundary=
089e0122e9f4f2573c051a84f0b5