Zero Outage Failover

Multi-Provider Gateway Failover
Zero Outage Email Delivery

Never lose a transactional email again. If your primary ESP experiences rate limiting, IP blacklisting, or downtime, Solidrix Send automatically cascades traffic to your backup gateways in milliseconds.

Build Resilient Email Architecture →
Priority Cascade

Smart Gateway Selection Strategies

Configure your gateways with priority ranks (e.g. Gateway 1: AWS SES, Gateway 2: Resend, Gateway 3: Postmark). If Gateway 1 returns a 5xx API error or exceeds its daily Redis quota limit, the router silently redirects the message to Gateway 2 without throwing an exception to your application.

  • ✔ Priority Cascade & Weighted Round-Robin Routing
  • ✔ Atomic Redis Quota Counters & Sliding Window Rate Limits
  • ✔ Real-Time Live Stream SSE Outage Alerts
// Gateway Cascading Event Log
[14:22:01] Gateway #1 (AWS SES): 429 Rate Limit Exceeded
[14:22:01] CASCADING traffic to Gateway #2 (Resend)
[14:22:02] Gateway #2 (Resend): 200 OK - Dispatched!
Status: FAILOVER SUCCESSFUL • 0 Lost Emails