All features
Send
Delivery rules
Guardrails for every channel. Define rules that match on recipient and decide the outcome (deny or allow), with a per-channel default when nothing matches. Stop test traffic reaching real inboxes for good.
app.messy.sh/rules
Two outcomes
Deny to block, allow to deliver.
First match wins
The first matching rule decides, with a clear per-channel default.
Per environment
Lock down staging while production sends freely.