How to set up a failover automation that switches to a second email provider if the first one hits a limit?
Automation & No-Code
Paragraph 1: Define the failover goals and constraints. Outline how you will detect limits and route to a backup provider.
Paragraph 2: Consider testing, rollback, and logging. Plan for edge cases such as partial failures and synchronization issues.
Paragraph 3: Ensure monitoring and alerting are in place for visibility and quick response.
Who is this for?
- Site reliability engineers and ops teams
- Developers building transactional email flows
- IT/DevOps staff responsible for uptime and sending limits
- Marketing teams relying on reliable delivery
Before you start
- Access to both providers' APIs
- Separate credentials for primary and backup
- Ability to modify routing logic or service layer
- Centralized logging and alerting
- A staging environment to test failover
General Process (How it works)
- Define objective and constraints Clarify failover goals, required uptime, acceptable delay, and success criteria.
- Choose primary and backup providers Select two email providers with API access, rate limits, and acceptable deliverability.
- Model switching logic Decide threshold and backoff policy for switching; determine whether to switch back when primary recovers.
- Implement routing and failover Add routing logic to switch providers when the threshold is met; ensure the switch is atomic and idempotent.
- Implement monitoring and alerts Track quotas, errors, and switch events; alert on anomalies.
- Test failover in staging Simulate primary limit events and verify backup kicks in without message loss.
- Deploy and monitor Roll out with logging, alerting, and rollback plan; monitor stability.
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