New ESP Block Policy Implementation Timeline
Effective Date: [12th Feb 2026]
This new ESP Block Policy will be implemented on 12th Feb Current users will receive advance notification and have time to review their email practices before enforcement begins.
What you should do now:
Review your current bounce classification data
Implement recommended email authentication and best practices
Clean your email lists and improve content quality
Monitor your ESP block rates closely
What Are ESP Blocks?
ESP blocks occur when major email providers (Gmail, Yahoo, Outlook, etc.) reject your emails due to:
Authentication failures (DMARC, SPF, DKIM issues)
Poor sender reputation
Content that appears spam-like
Policy violations
Technical configuration problems
Unlike regular bounces, ESP blocks are calculated separately and trigger immediate restrictions to protect your long-term email deliverability.
ESP Block System
| ESP Block Rate | Action | Duration | Block Level |
|---|---|---|---|
| 3% | Warning Email Sent | Immediate notification | Pre-Block Warning |
| 5% | Email sending suspended | 12 hours | 1stblock |
| 3% (after 1stblock) | Critical Warning Email Sent | Immediate notification | Pre-2nd Block Warning |
| 5% (after 1stblock) | Email sending suspended | 24 hours | 2ndblock |
| 3% (after 2ndblock) | Final Warning Email Sent | Immediate notification | Pre-3rd Block Final Warning |
| 5% (after 2ndblock) | PERMANENT SUSPENSION | Permanent | 3rdblockFINAL |
Critical: All blocks are reset after 7 consecutive days of maintaining ESP block rates below 1%.
In this release, email sending will not be permanently disabled. Each block will be temporary and limited to a 24-hour duration only.
If your email service isblocked due to ESP Block Detected, you will see the following error message displayed as a top banner inside the affected subaccount:
Email sending is blocked due to a high number of spam blocks from email providers.
This block is enforced to protect email deliverability and prevent further reputation damage with Email Service Providers (ESPs).
How to Request Permanent Unblock
Permanent unblocking cannot be done automatically. Reach out to our agency owner in order to unblock the same.
Why This Matters
Protecting Your Business
ESP blocks damage your sender reputation permanently
Poor reputation leads to emails landing in spam folders
Reduced deliverability impacts your business revenue
Recovery can take weeks or months without proper action
Industry Standards
Major ESPs are increasingly strict about email quality
Authentication requirements are now mandatory
Content filtering has become more sophisticated
Sender reputation affects all future campaigns
Next Steps
Analyze: Use the Bounce Classification to understand your specific ESP blocks
Fix: Address the identified issues using our detailed support guides
Monitor: Track your improvements through the analytics dashboard
Verify: Ensure fixes are working before resuming normal sending
Support Resources
Bounce Classification
Access detailed ESP block analysis
View error categories and volumes
Get specific recommendations for your account
Monitor improvement progress
Category-Specific Support Guides
Each ESP block category in your analytics dashboard links to detailed fix guides:
DMARC Authentication Failures
Domain/IP Reputation Issues
Content and Spam Filtering
Technical Configuration Problems
And more...
Time-Sensitive Actions
Before Policy Implementation
Complete email authentication setup
Clean all email lists thoroughly
Optimize email content and templates
Test email delivery across major providers
Monitor analytics dashboard daily
When Policy is Active Within 24 Hours of Warning
Review analytics data immediately
Identify top 3 ESP block categories
Begin implementing critical fixes (authentication, major content issues)
When Policy is Active Within 48 Hours of Block
Complete all technical fixes
Clean email lists and remove problematic content
Test email delivery to major provi