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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