Reputation
Check
Check domain and IP reputation across blacklists
Analyze email sender reputation and authentication
Check Sender Reputation
Enter a domain name or IP address to check reputation
Blacklist Status
Check major spam blacklists
Reputation Score
Overall sender reputation rating
Email Config
SPF, DKIM, DMARC validation
Why Check Sender Reputation?
Poor sender reputation leads to emails landing in spam or being blocked entirely. Regular reputation monitoring helps maintain high deliverability rates.
Monitor Reputation 24/7Sender Reputation Guide
Understanding and maintaining email sender reputation
What Affects Sender Reputation
- Blacklist Status: Being listed on spam blacklists severely impacts reputation
- Authentication: Proper SPF, DKIM, and DMARC configuration
- Engagement Rates: Open rates, click rates, and user interactions
- Complaint Rates: Users marking emails as spam
- Bounce Rates: Sending to invalid or non-existent addresses
- Volume Consistency: Sudden spikes in sending volume
- Content Quality: Spam-like content or suspicious links
Major Email Blacklists
Email blacklists (RBLs) track IP addresses and domains known for sending spam. Major providers check these lists before accepting email. Key blacklists include Spamhaus (most influential), Barracuda, SpamCop, SURBL (domain reputation), and UCEPROTECT. Being listed can block email delivery entirely. Each blacklist has different listing criteria and delisting procedures. Some are automated, others require manual requests.
Improving Sender Reputation
Build reputation gradually by starting with small volumes to engaged recipients. Implement proper authentication (SPF, DKIM, DMARC) and maintain consistent sending patterns. Remove inactive subscribers regularly, honor unsubscribe requests immediately, and monitor blacklists proactively. Use dedicated IPs for high-volume sending and separate transactional from marketing email streams. Most importantly, send relevant content that recipients want to receive.
Protect Your Sender Reputation
InboxKit monitors reputation 24/7, alerts you to issues, and helps maintain high deliverability