Low IP Reputation - Restore Sending IP Credibility

Your sending IP address has developed a poor reputation with email providers and security services, causing your emails to be blocked or rejected. Unlike domain reputation, IP reputation is tied to the specific server or infrastructure sending your emails. On the platform, this means the IP infrastructure you're using needs reputation recovery through improved sending practices and proper list management.

What's Happening? Your sending IP address has developed a poor reputation with email providers and security services, causing your emails to be blocked or rejected. Unlike domain reputation, IP reputation is tied to the specific server or infrastructure sending your emails. On the platform, this means the IP infrastructure you're using needs reputation recovery through improved sending practices and proper list management.

IP reputation issues are often more immediate than domain reputation problems, as they can result in complete blocking rather than just spam folder placement. The good news is that IP reputation can be restored more quickly than domain reputation with the right approach.

Quick Diagnosis: Identifying IP Reputation Issues

Look for these bounce messages that indicate IP reputation problems:

• "The sending server's IP address is on a block list, causing Outlook to reject the message"
• "The sending server's IP is blocked due to poor reputation or suspicious activity"
• "The sending server's IP address is blocked or refused due to a history of abuse or suspicious activity"
• "The sending server's IP is blocked or blacklisted due to poor reputation or spam reports"
• "The sending server's IP address has a poor reputation, causing the recipient to reject the message"
• "The sending server's IP has a history of violating recipient policies, leading to mail being blocked"
• "The sending server's IP is on a blocklist, causing rejection by the recipient's email provider"
• "The sending server's IP address is listed on one or more DNS-based blacklists"
• "The sending IP is listed on a reputation blocklist, causing the recipient server to reject the message"
• "The sending IP or domain is listed on public blocklists due to suspected spam or abuse"
• "The sending server's IP is blacklisted, causing email rejection"

Understanding IP Infrastructure

• The platform maintains excellent IP reputation.
• No manual IP reputation management required.
• Benefit from collective good sending practices of the community.
• Automatic load balancing across multiple high-quality IPs.
• No warm-up required — ready to send immediately.
• Professional monitoring and maintenance handled by the platform.
• Exclusive IP address assigned only to your account.
• Complete control over your IP reputation.
• Built-in SNDS monitoring available on the platform.
• Access to advanced IP analytics and reporting.
• Ideal for consistent high-volume sending (150,000+ emails/month).
• Requires proper warm-up process for optimal performance.

Aspect | IP Reputation | Domain Reputation

Where | Tied to the server/infrastructure sending emails | Tied to your specific sending domain

Management | Professionally managed by the platform (shared IP) | Under your direct control

Recovery | Can be restored relatively quickly with proper practices | Follows you regardless of ESP changes

Impact | More immediate — affects delivery speed | Long-term factor in inbox placement

Step-by-Step IP Reputation Recovery

Check your IP configuration:

For shared IP users (most users):

The platform maintains excellent IP reputation for all shared IP users. You don't need to worry about IP reputation management — focus on your domain reputation and sending practices instead!

For dedicated IP users:

For shared IP users:

Your focus areas:

• Ensure SPF, DKIM, DMARC are properly configured.
• Maintain clean, engaged email lists.
• Send relevant, valuable content to subscribers.
• Follow email marketing best practices.

What the platform handles: IP reputation monitoring, blacklist management, infrastructure optimization.

For dedicated IP users:

Essential list management:

1. 1Go to.
2. 2Create filters to manage:

Strengthen domain authentication:

1. 1Navigate to.
2. 2Click for your domain.
3. 3Maintain consistent "From" domain usage.
4. 4Keep all authentication records up to date.

Advanced Monitoring for Dedicated IP Users

1. 1Navigate to.
2. 2Click on the tab.
3. 3Review the following metrics:
4. 4Set up a regular monitoring schedule (daily/weekly).
5. 5Document trends and changes.

Interpreting SNDS data:

Green status: Excellent reputation, continue current practices.

Yellow status: Monitor closely, optimize sending practices.

Red status: Immediate action required, review all practices.

• Add your sending domain at.
• Track delivery error patterns.
• Set up alerts for performance changes.

When to Consider Dedicated IP

• You consistently send >150,000 emails per month.
• You want access to detailed SNDS monitoring.
• You need complete control over IP reputation.
• Your business requires maximum deliverability control.
• You can maintain consistent sending volumes.
• You want advanced IP analytics and reporting.
• Access Microsoft reputation data directly.
• Your sending practices directly impact reputation.
• Detailed reputation tracking and reporting.
• Your reputation isn't influenced by others.
• Better suited for high-volume sending.

Best Practices for All Users

• Separate engaged from unengaged contacts.
• Monthly review of contact quality.
• Ensure subscriber confirmation.
• Prioritize engaged subscribers over list size.
• Test campaigns before sending.
• Use recognizable "From" names.
• Match subscriber expectations.
• Process opt-outs immediately.
• Maintain regular sending patterns.
• Ensure SPF, DKIM, DMARC are configured.
• Use the same authenticated domain.
• Ensure emails render well on all devices.
• Check authentication status monthly.
• Focus on domain reputation and list quality.
• Stable performance with optimized practices.
• Maintain best practices for continued success.
• Address blacklist issues, optimize practices.
• Monitor SNDS data, gradual improvement.
• Full reputation recovery and stable performance.
• Continuous monitoring and optimization.
• For general deliverability guidance and best practices.
• For SNDS data interpretation and IP-specific issues.
• DNS configuration assistance.
• Discuss upgrade options and requirements.
• Get recommendations for your specific use case.
• Shared or dedicated IP.
• Bounce messages, delivery problems.
• Current and planned email volumes.
• Screenshots from your dashboard (dedicated IP users).

Still Having Issues? If you continue to experience IP reputation challenges:

1. 1Focus on domain reputation and sending practices — the platform handles IP reputation automatically.
2. 2Review your SNDS data and optimize accordingly.
3. 3Ensure perfect domain authentication and list quality.
4. 4Leverage their expertise and platform knowledge.
5. 5For advanced optimization strategies.

The platform's infrastructure is designed to maintain excellent IP reputation automatically for shared IP users, while dedicated IP users get advanced monitoring tools built right into the platform. Focus on what you can control — domain reputation, list quality, and content optimization.

Frequently Asked Questions