553 Message Filtered on our domain

I need a solution

Hi there, 

Our domain’s email-addresses  (ending in globaldiversitypractice.com) are being filtered by Symantec under a 553 – Message filtered error. I’ve already submitted a copy of the e-mail to the investigation email address but this is quite an urgent enquiry as many of our clients are no longer receiving our e-mails. 

An example of the error message I received is located below: 

Original Message Details
Created Date: 11/10/2018 15:08:33
Sender Address: waseem.ilyas@globaldiversitypractice.com
Recipient Address:  
Error Details
Reported error: 550 5.0.350 Remote server returned an error -> 553 Message filtered. Refer to the Troubleshooting page at;http://www.symanteccloud.com/troubleshooting for more;information. (#5.7.1)

Please can you help? I’ve already used mxtoolbox.com to verify that our SPF, DNS and MX records are all functioning correctly, and have had a look for our domain on any blacklists but it isn’t showing up on any that I’m aware of. 





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