Platform
Engineered for deliverability.
Every detail — from routing to suppression — designed so your sending reputation stays clean.
Per-tenant isolated reputation
Each tenant can be assigned to a dedicated pool. Routing is resolved on every message through a Postfix socketmap.
Centralised suppression list
Hard bounces (DSN 5.x.x) and FBL ARF complaints are automatically added to the list, per tenant and platform-wide.
Automatic warm-up
Warm-up curves configurable per pool or per IP. smtp_destination_rate_delay and concurrency_limit are adjusted daily.
Reactive auto-throttling
Every 5 minutes, we compute a reputation score. On a deferrals/bounces spike, the IP is temporarily throttled and re-evaluated after 6h.
Multi-server by design
Data plane / control plane architecture. MTAs keep running locally even if Cloudflare is down.