Email Sender Reputation Checklist
Build and maintain a strong email sender reputation with this checklist covering authentication, engagement, list quality, and monitoring.
Build Your Reputation
Set up full email authentication (SPF, DKIM, DMARC)
mediumComplete authentication tells ISPs you're a legitimate sender. All three protocols should be properly configured and aligned.
Warm up new domains and IPs gradually
easyStart with low volume to trusted contacts, then increase over 2-4 weeks. Never blast high volume from a new domain.
Send consistently, not in bursts
easyISPs look for consistent sending patterns. Avoid going from 0 emails to 10,000 in a day. Maintain regular, predictable sending volume.
Protect Your Reputation
Keep bounce rate under 2%
easyVerify all email addresses before sending. Hard bounces are the fastest way to damage sender reputation.
Keep spam complaint rate under 0.1%
easyIf more than 1 in 1,000 recipients mark your email as spam, ISPs will throttle or block your emails. Make unsubscribing easy.
Maintain positive engagement signals
mediumOpens, clicks, and replies all build positive reputation. Remove contacts who consistently don't engage.
Honor unsubscribes immediately
easyProcess unsubscribe requests within 24 hours. Continuing to send after unsubscribe generates spam complaints.
Monitor Your Reputation
Set up Google Postmaster Tools
easyFree tool from Google that shows your domain reputation, spam rate, authentication results, and delivery errors for Gmail recipients.
Monitor blacklist status regularly
easyCheck your domain and IPs against major blacklists weekly. Set up automated alerts for new listings.
Track deliverability metrics per campaign
easyMonitor inbox placement rate, bounce rate, and spam complaint rate for each campaign. Investigate any anomalies immediately.
Pro Tips
- Your sender reputation is tied to both your domain and sending IP — protect both
- Verify every email address with Cleanlist before sending to keep bounce rates near zero
- A damaged reputation takes weeks to recover. Prevention is far easier than remediation
- ISPs share reputation data — a bad reputation at Gmail will eventually affect Outlook and Yahoo too
Related Cleanlist Features
Related Checklists
Frequently Asked Questions
What affects my email sender reputation?
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Key factors include bounce rate, spam complaint rate, engagement metrics (opens, clicks, replies), email authentication setup, sending volume consistency, and blacklist status. ISPs like Gmail and Outlook score senders on all these factors to determine whether emails reach the inbox.
How long does it take to build sender reputation?
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Building a positive reputation from a new domain takes 2-4 weeks of gradual volume increase with good engagement. Maintaining it requires ongoing list hygiene and monitoring. Recovering a damaged reputation can take 4-8 weeks of reduced volume and improved practices.
How do I check my email sender reputation?
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Use Google Postmaster Tools for your Gmail reputation, check blacklists with MXToolbox, and monitor your ESP's deliverability dashboard. Some ESPs also provide a sender score. A combination of these tools gives you a complete picture of your reputation.
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