If your emails are being blocked by Outlook (or Hotmail), it’s likely because your IP address or domain has been flagged for suspicious activity. Don’t worry—this guide will walk you through the steps to identify the issue and resolve it
Why Was I Blocked by Outlook?
Before requesting removal, it’s important to understand why you were blocked. Common reasons include:
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High spam complaints: Recipients marked your emails as spam.
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High bounce rates: Too many invalid or non-existent email addresses.
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Suspicious sending patterns: Sudden spikes in email volume or unusual activity.
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Misconfigured DNS settings: Missing or incorrect SPF, DKIM, or DMARC records.
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Poor IP/domain reputation: A history of spam or abuse associated with your IP or domain.
Important Note: Submitting multiple removal requests without fixing the underlying issue will delay the process. Always address the root cause first.
Step 1: Fix the Problem
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Review your email practices:
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Ensure you’re sending relevant, non-spammy content.
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Avoid sending to unverified addresses.
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Check your DNS settings:
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Verify that your SPF, DKIM, and DMARC records are correctly configured.
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Monitor your sending volume:
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Avoid sudden spikes in email volume. Gradually increase sending limits.
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Reduce bounce rates:
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Clean your email list regularly to remove invalid or inactive addresses.
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Minimize spam complaints:
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Include a clear unsubscribe link in every email.
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Use double opt-in to ensure recipients want your emails.
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Step 2: Submit a Removal Request
Once you’ve resolved the issue, you can request removal from the Outlook blocklist.
Option 1: Use the Microsoft Sender Information Form
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Visit the Microsoft Sender Information Form.
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Provide all requested information, including:
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Your IP address or domain.
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A detailed explanation of the issue and steps taken to resolve it.
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Your contact information for follow-up.
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Submit the form.
Processing Time: Requests are typically reviewed within 2-3 business days.
Option 2: Email Microsoft Directly
If the form doesn’t work, you can email delist@microsoft.com with the following details:
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The blocked IP address or range of IPs.
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A brief explanation of the issue and steps taken to resolve it.
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Your contact information for follow-up.
Step 3: Monitor and Prevent Future Blocks
After being unblocked, take these steps to maintain good standing:
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Improve your sender reputation: Use Warmy to improve your IP reputation and domain health.
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Follow email best practices: Stick to verified lists, avoid spammy content, and maintain consistent sending patterns.
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Regularly check DNS settings: Ensure SPF, DKIM, and DMARC records are up to date.
Need Help?
If you’re still having trouble, our team is here to assist. Contact us for personalized support or advice on improving your email deliverability.