Mail Delivery Failure – Error 552 5.2.2

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Hi all,

I’m facing an issue in regard to my marketing email. Once I send a marketing email to my subscribers I receive failed delivery emails from some subscribers. I read already in google about this issue. I can confirm the subscribers’ emails are correct. So, I wonder if is it possible to fix this issue.

Thanks in advance

screenshot:

https://ibb.co/kK3bdbk

The page I need help with: [log in to see the link]

 

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