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{LED=421-4.7.28 Gmail has detected an unusual rate of unsolicited mail originating 421-4.7.28 from your DKIM domain [ 15].

Anonymous
2023-11-23T04:29:12+00:00

{LED=421-4.7.28 Gmail has detected an unusual rate of unsolicited mail originating 421-4.7.28 from your DKIM domain [ 15].

Hi Guys, we're facing with issue with gmail accounts. Our organisation trying the send the emails to gmail account. Due to the bulk amount of email gmail is blocking us for 24hrs each time. Would you please let me know how to resolve. Does it had the same kind of issue ? I think we need to change some entries in SPF and DKIM. Thank you

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  1. Anonymous
    2023-12-22T17:46:05+00:00

    Hi Paul,

    I am experiencing the same problem (421 4.7.28), but all comments in this thread talk about "your organisation" etc.

    I am a private individual, sending only 2 or 3 emails to Gmail recipients, and they are returned.

    I am not sending hundreds of emails.

    What do I need to do get get out of thiis problem?

    Thanks.

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  2. Anonymous
    2023-12-07T10:34:28+00:00

    SMTP service unavailable: "421 4.7.28 Gmail has detected an unusual rate of unsolicited mail originating from your SPF(DKIM) domain [ xxxxxxxxx 15]. To protect our users from spam, mail sent from your domain has been temporarily rate limited. Please visit https://support.google.com/mail/?p=UnsolicitedRateLimitError to review our Bulk Email Senders Guidelines.

    ....

    .....

    Hello there, We're having trouble with gmail accounts. Could you please tell me how to resolve this? I believe we need to modify certain SPF and DKIM entries. Thank you very much.

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  3. Anonymous
    2023-11-23T09:48:18+00:00

    Dear Jani Basha Mulla,

    Hope you are doing well!

    I have been checking on this issue, it seems like you are experiencing an issue with Gmail blocking your organization's emails due to an unusual rate of unsolicited mail originating from your DKIM domain. This can happen if your emails are being marked as spam by Gmail's filters.

    1. Have you check if your organization's email server is on any blacklists? You can use online tools like MX Toolbox to check this.
    2. Does this happen to all and only emails sent to Gmail? Please review your organization's email sending practices and ensure that you are not sending unsolicited emails.
    3. Have you checked if your SPF and DKIM records are set up correctly? You can use online tools like MX Toolbox or Microsoft's Remote Connectivity Analyzer at https://testconnectivity.microsoft.com/ to check this.
    4. If you are still experiencing issues, you can contact Gmail support for further assistance.

    Please refer to Authenticate Outbound Email to Improve Deliverability - Microsoft Community Hub.

    I hope this helps! Let me know if you have any other questions. Thank you very much for your patience and cooperation.

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  4. Anonymous
    2023-11-23T05:27:04+00:00

    Thanks Paul. Looking forward to you reply

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  5. Anonymous
    2023-11-23T05:20:10+00:00

    Dear Jani Basha Mulla,

    Good day! Thank you for posting to Microsoft Community. We are happy to help you.

    Based on your description, I understand that you have a query "{LED=421-4.7.28 Gmail has detected an unusual rate of unsolicited mail originating 421-4.7.28 from your DKIM domain [ 15].". At this very moment, I am looking into whether there could be a possible solution to this issue. I will get back to you as soon as I get any additional information about your query.

    Your patience and cooperation are much appreciated.

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