Mail Forward Failure Status: 554 Technical details of the failure: 5.1.0

Mail Forward Failure Status: 554 Technical details of the failure: 5.1.0

Hello,

for few months I am fighting with mail forward failures.

The error message

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The following message could not be forwarded to XXX for AAA

Technical details of the failure:

5.1.0 You are not welcome here.

Reporting-MTA: dns; mx.zoho.com

Arrival-Date: Mon, 1 Jul 2019 05:37:11 +0000

Original-Recipient: rfc822; AAA

Final-Recipient: rfc822; XXX

Status: 554

Action: failed

Last-Attempt-Date: 1 Jul 2019 05:37:21 GMT

Diagnostic-Code

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When I disable Anti-spam function in Control Panel, the frequency of erorrs was lowered, but there are some mails which are blocked and not forwarded. Could you give me some tips what to do?

I don't need any anti-spam function in mailbox.

Thank you