How can broken CNAME or tracking domains affect deliverability?

Broken CNAME effects:

• Links do not resolve or redirect properly
• SSL certificate errors
• Click tracking fails
• Open tracking fails

Deliverability impact:

• ESP may fall back to shared tracking domain
• Shared domains have mixed reputation
• Broken links look suspicious to filters
• Recipients see errors, may report as spam

Diagnosis:

• Test links in emails
• Verify CNAME resolves correctly
• Check SSL certificate validity
• Confirm tracking records in ESP

Prevention:

• Monitor tracking domain health
• Alert on CNAME or SSL issues
• Test after any DNS changes

Broken waybill tracking makes shipments look suspicious and causes delivery issues.