Test inbox placement
Run placement tests across major mailbox providers before you send. Check whether a test message reaches the inbox or spam folder and adjust with evidence.
Platform / DeliverabilityBuilt to reach
Built to reach
the other side.
IP reputation, automatic fallback, and gradual warming. Give your messages the best route, with every decision in view.
Delivery healthSample data
Sending routeGmailOutlookYahoo
Shared pool Healthy Healthy Healthy
Dedicated IP HealthyDeferred Healthy
Smart Relay Healthy Healthy Healthy
Always looking ahead.
When a route slows down, Smart Relay keeps your messages moving.
The details make
all the difference.
Thoughtful infrastructure, from the first API call to the last delivery event.
Smart Relay fallback
Use your dedicated IP for everyday sending. When a mailbox provider throttles or defers a message, Smart Relay can reroute it through the relay pool automatically.
30-day warming schedule
Build a new dedicated IP's reputation with a managed 30-day sending schedule. FlashPost handles the gradual ramp so your team does not have to maintain it manually.
Choose your sending route
Start with a managed IP Pool, use a Single IP for a dedicated reputation, or choose Smart Relay for dedicated sending with pool fallback. Change modes as your volume grows.
Automatic suppression
Let FlashPost handle bounces and unsubscribes automatically. Keep suppression management alongside delivery instead of building a separate process in your application.
Reputation you can follow
A daily health score and Gmail Postmaster signals help explain your sender reputation. Use them with placement tests to decide where to focus your next improvement.
See delivery
from every angle.
Explore a successful delivery, then see what changes when automatic fallback steps in.
Workspace / OverviewEvery message. In view.
Follow an email from your API to their inbox.
Message accepted
SPF, DKIM & DMARC passed
Routed through dedicated IP
Delivered to receiving server
Message accepted by the receiving server.198 ms total
One API. Every step accounted for.Explore the platform