Operational status: All systems operational
SMTP relay, API, and dashboard targets 99.9% uptime. Delivery times may vary by recipient provider load and your sender reputation.
01 status
SMTP-X delivery status.
Transactional mail must arrive immediately — not eventually. We monitor average delivery times to major mailbox providers and publish infrastructure health here.
Current delivery performance
Measured average delivery times from SMTP-X infrastructure (homepage metrics, Jul 2026).
5.29s
Gmail
4.99s
Hotmail
8.32s
Yahoo
119.12s
Apple
What we monitor
SMTP & API
Outbound relay and REST API availability for transactional and bulk sends.
Delivery latency
Time from accept to major provider handoff — benchmarked per mailbox provider.
IP reputation
Continuous monitoring of dedicated IP pools — see enterprise outbound filtering.
Delivery issues on your account?
Run the Mail Tester and blacklist check, then contact support Mon–Fri 07:30–16:30 GMT+2.