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sibam_netcore
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Bounce error || SMC Policy Violation for virginmedia domains

We are into email marketing service and our clients are sending transaction, triggered and notification emails to their subscribed database.

We're an ESP sending emails on behalf of clients who are receiving the following bounce error from virgin media domains (blueyonder.co.uk, ntlworld.com, virginmedia.com,virgin.net) across multiple different domains and IP:

 Error :4.2.0 (unknown mailbox-related status),"smtp;421 4.2.0 MXIN618 Temporary SMC Policy Violation detected, retry later ;id=528Qm33pw93FY528QmHYVF;sid=528Qm33pw93FY;mta=mx7.tb;dt=2021-07-18T10:26:51+02:00

We have tried "sending later", as suggested in the error but no emails are being allowed through. Would someone please be able to help me with the cause of this error, and how we may resolve it moving forwards? We could not find any information on it online nor action I can take for it to be removed.

You can visit our official site on,

https://netcorecloud.com/

Thank You,

Sibam Sain

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