554 5.7.1 Email cannot be delivered. Reason: Email detected as Spam by spam filters.

554 5.7.1 Email cannot be delivered. Reason: Email detected as Spam by spam filters.

Hi I am using a James mail server to send notification to myself (this email). But recently it seems to be blocked by your side.

Below are the message I got from the bounce email. Even though I have added domain to the whitelist to the whitelist. Please unblock or how I can prevent from marking as Spam. 

Failed recipient(s):
support@joker96.com

Error message:
554 5.7.1 Email cannot be delivered. Reason: Email detected as Spam by spam filters.


Final-Recipient: rfc822;  support@joker96.com
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp; 554 5.7.1 Email cannot be delivered. Reason: Email detected as Spam by spam filters.
Last-Attempt-Date: Wed, 13 Jun 2018 16:39:25 +0800 (SGT)
--------- Forwarded message ----------
From: support@joker96.com
To: support@joker96.com
Cc: 
Bcc: 
Date: Wed, 13 Jun 2018 08:39:25 +0000