DOMÍNIO EM BLACKLIST

Richardson Almada 0 Reputation points
2025-12-05T21:59:46.8533333+00:00

Ao enviar emails aparece que está na blacklist da Microsoft, segue a mensagem que retorna ao enviar qualquer email para destinários da Microsoft:
This is the mail system at host mail.corporeinvest.com.br. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message.                    The mail system ******@outlook.com: host     outlook-com.olc.protection.outlook.com[52.101.73.17] said: 550 5.7.1     Unfortunately, messages from [179.184.10.140] weren't sent. Please contact     your Internet service provider since part of their network is on our block     list (S3150). You can also refer your provider to     http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol     Filter Agent][AGT=PFA][MxId=11BC5D6C57E32E02]     [AMS0EPF0000019A.eurprd05.prod.outlook.com 2025-12-05T21:27:35.095Z     08DE2EB6362AFF2F] (in reply to MAIL FROM command

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  1. Q&A Assist
    2025-12-05T21:59:59.7033333+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    If you are receiving a message indicating that your emails are being blocked due to being on a blacklist, you can take the following steps to address the issue:

    1. Identify the Error Code: The error message you received includes a specific error code (550 5.7.1), which indicates that your sending IP address is blocked. This is a common issue when the IP address has been flagged for sending spam or malicious content.
    2. Use the Delist Portal: You can request removal from the Microsoft 365 blocked senders list by using the Office 365 Anti-Spam IP Delist Portal. Visit sender.office.com to submit your request.
    3. Contact Your ISP: The error message suggests contacting your Internet Service Provider (ISP) since part of their network is on the block list. They may need to take action to resolve the issue.
    4. Follow Best Practices: Ensure that you are following best practices for sending emails to avoid being flagged in the future. This includes proper email authentication and maintaining a good sender reputation.
    5. Monitor Your Email Sending Practices: Regularly check your email sending practices and ensure that your domain is not compromised or misused for sending spam.

    If you continue to experience issues, consider reaching out to Microsoft Support for further assistance.


    References:

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  2. Richardson Almada 0 Reputation points
    2025-12-05T22:08:51.9666667+00:00

    Já usei o portal indicado pela Ia porém persiste o problema.

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  3. EmilyS726 184K Reputation points Independent Advisor
    2025-12-05T22:38:54.0433333+00:00

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    Olá,

    Seu endereço IP está na lista negra UCEPROTECTL2/L3. Esta é uma lista negra de terceiros, não mantida pela Microsoft, mas a Microsoft a utiliza como referência.

    Se você está na UCEPROTECTL2/L3, significa que seu endereço IP, fornecido pelo seu provedor de internet, está em uma faixa de baixa reputação (ou seja, toda a faixa de endereços IP está bloqueada porque o provedor hospeda spammers).

    Você precisa entrar em contato com seu provedor de internet ou com seu provedor de domínio e solicitar que seu endereço IP seja transferido para uma faixa diferente. A Microsoft não removerá este IP da lista negra, pois ele pertence a uma entidade terceirizada.

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