TABLE OF CONTENTS

• What's Happening?
• Quick Diagnosis: Identifying Blacklist Issues
• Understanding Blacklist Blocks
• Step-by-Step Blacklist Resolution
• Recovery Timeline and Expectations
• Ongoing Monitoring and Prevention
• Still Having Issues?

Resolving Blacklisted URL/IP/Domain Email Blocks

What's Happening?

Your emails are being blocked because one or more components in your email campaign have been flagged by public blacklists (RBLs/DBLs). This could be your sending IP address, your domain, or URLs included in your email content. Email providers use these blacklists as a first line of defense against spam, and being listed can severely impact your email deliverability across multiple platforms.

Quick Diagnosis: Identifying Blacklist Issues

Bounce Message Examples

• Email blocked due to listed URLs or IPs/domains on public blacklists (RBLs/DBLs).

Understanding Blacklist Blocks

Key Concepts

Common Blacklist Types

Step-by-Step Blacklist Resolution

Step 1: Identify What's Blacklisted

Check Your Sending Infrastructure:

1. Find your sending IP:
   • Go to Settings → Email Services → Sending Domain and IP
   • Note your configured sending domain and any IP information displayed
   • If using shared infrastructure, contact support for IP details
2. Use external blacklist checkers:
   • Visit MXToolbox.com → Blacklist Check
   • Enter your sending IP address
   • Check your sending domain separately
   • Test any URLs frequently used in your campaigns

Step 2: Analyze Email Content

Review Recent Campaigns:

1. Access your campaign history:
   • Go to Marketing → Emails → Campaigns
   • Review campaigns sent in the last 7-14 days
   • Look for any new URLs, domains, or shortened links
2. Check for problematic content:
   • Shortened URLs (bit.ly, tinyurl, etc.)
   • Newly registered domains
   • URLs with suspicious extensions (.tk, .ml, .ga)
   • Links to file-sharing services

Step 3: Submit Delisting Requests

Contact Blacklist Operators:

1. For Spamhaus listings:
   • Visit spamhaus.org → SBL/CSS/PBL Removal
   • Enter your IP/domain and follow removal process
   • Provide detailed explanation of remediation steps
2. For other major blacklists:
   • Barracuda: barracudacentral.org/rbl/removal-request
   • SpamCop: spamcop.net → Reporting → Remove
   • SURBL: surbl.org → Whitelist Request

Step 4: Implement Preventive Measures

Strengthen Your Email Practices:

1. Update email templates:
   • Go to Marketing → Emails → Templates
   • Remove any flagged URLs or domains
   • Replace shortened URLs with full, reputable links
   • Add clear unsubscribe links and physical addresses
2. Improve list hygiene:
   • Go to Contacts → Smart Lists
   • Create segments for engaged subscribers only
   • Remove bounced and unengaged contacts regularly

Recovery Timeline and Expectations

Phase 1: Immediate Actions (0-24 hours)

• Action: Identify blacklisted components and submit removal requests
• Expected outcome: Confirmation of blacklist status and removal request submission

Phase 2: Delisting Process (24-72 hours)

• Action: Monitor blacklist status and follow up on removal requests
• Expected outcome: Gradual removal from blacklists, improved delivery rates

Phase 3: Reputation Recovery (1-4 weeks)

• Action: Maintain clean sending practices and monitor deliverability
• Expected outcome: Full restoration of email deliverability and sender reputation

Ongoing Monitoring and Prevention

Weekly Monitoring Routine

1. Check blacklist status:
   • Use MXToolbox.com weekly blacklist monitoring
   • Set up alerts for any new listings
   • Monitor Sender Score at senderscore.org
2. Review metrics:
   • Go to Reporting → Email Analytics
   • Monitor bounce rates (should stay under 2%)
   • Watch for sudden delivery rate drops

Best Practices for Prevention

Still Having Issues?

If you continue to experience blacklist-related delivery problems:

1. Document everything: Keep records of all delisting requests and responses
2. Consider dedicated IP: Explore dedicated IP options if available
3. Review sending practices: Audit your entire email strategy for compliance issues
4. Get professional help: Complex blacklist issues often require expert intervention