How does DNS TTL tuning improve email reliability?
Strategic TTL management:
Stable periods: Higher TTL (3600-86400)
Fewer queries, better caching
Minor delay acceptable for rare changes
Before planned changes: Lower TTL (300-600)
Faster propagation when change happens
Quicker rollback if needed
During issues: Lower TTL enables faster fixes
Changes take effect quickly
Easier troubleshooting
After stabilization: Raise TTL back
Resume efficient caching
Reduce query load
Dynamic TTL management improves both reliability and operational flexibility.
Adjustable refresh schedules. Shorter during inspections, longer during normal operations.
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