2026-03-19 Update
about 2 hours ago by zhangshuangxi
About DKIM configuration modes
Aurora SendCloud provides two DKIM configuration modes when you create a new domain:
Automated Security DKIM(Recommended)
Through Aurora SendCloud's Automated Security DKIM feature, keys are rotated on a preset schedule with no manual intervention.
Classic DKIM
Generates a fixed DKIM TXT record that remains static post initial setup，Supports both 1024-bit and 2048-bit key lengths.
Mode Comparison
| Feature | Automated Security DKIM | Classic DKIM |
|---|---|---|
| Key Rotation | Auto-scheduled (120-day default) | Static, manual updates required |
| DNS Setup | 2 x CNAME records | 1 x TXT record |
| Maintenance Effort | Low, no ongoing work | High, manual sync needed |
| Security Posture | High (regular key refresh) | Dependent on manual maintenance |