Get visibility into delivery and control over routing before making any migration decisions.
Before anything changes in your stack, we show you how SendPost runs SendX today. You can see how traffic is observed and controlled at scale, and what day-to-day operations look like when SendPost is in place. This gives you a concrete reference for how SendPost behaves under real load.
We set up a proof-of-concept on top of your current SendGrid infrastructure. SendPost connects via API and sits alongside SendGrid — no disruption to your existing sending. It applies flow control and collects delivery data while your sending continues unchanged. At this stage, you're evaluating visibility, control, and insights.
See the SendGrid integration guideWith data flowing, SendPost begins its Diagnose, Repair, Protect process. Identifying delivery risks early, highlighting provider-specific constraints, and showing what actions SendPost would take to protect reputation. You see the value before any routing decisions are made.
Start with a proof-of-concept on your existing SendGrid setup. No commitment, no risk.
Only after you're confident in the data do you begin routing traffic through SendPost infrastructure. Migration is gradual and fully controlled by you. You decide how much traffic is routed through SendPost and how much remains on SendGrid. SendPost provides guidance based on delivery signals, domain history, and IP reputation.
As volume increases, SendPost shifts from migration support to scale support. Track how deliverability improvements affect revenue, measure efficiency gains from fewer incidents and manual interventions, and use AI reporting to guide scaling decisions.
As SendPost becomes part of your stack, you define clear sending policies inside the system. These policies control how traffic behaves when delivery signals change — when to slow down, pause, or reroute volume. Instead of reacting manually to incidents, actions are enforced automatically based on agreed thresholds.
You don't move all your traffic at once. Most teams start by routing 0% through SendPost infrastructure, then introduce a small percentage and increase only when the numbers look good.
Traffic routing is handled at an IP-pool level. Decide how much volume sends through SendGrid vs. SendPost and adjust the split anytime.
If something doesn't look right, we don't push you through it. You can reduce the SendPost share, pause routing, or go back to 100% SendGrid.
You have access to people who help you interpret the data, adjust routing, and move at a pace that makes sense.
SendPost connects using scoped API access and does not import, modify, or delete your historical data.
Route traffic through SendPost's pre-warmed IPs or keep volume on SendGrid while you evaluate performance.
Everything you need to know about SendPost and transactional email delivery
There's no long migration window or overnight cutover. For teams that are active, initial setup is often done in a few hours — connecting accounts is quick, domain verification is straightforward, and routing configuration is simple. The part that varies is how long it takes to integrate the SendPost API, since that depends on your codebase and technical process. Most teams are able to start sending or observing traffic the same day, then increase volume gradually over time.
No. The proof-of-concept runs on top of your existing SendGrid infrastructure. Your sending continues on SendGrid while SendPost sits alongside it, collecting delivery data and applying flow control. You only begin routing traffic through SendPost infrastructure when you're confident in the data.
Migration is fully reversible at every stage. You can reduce the SendPost traffic share, pause routing, or return to 100% SendGrid at any time. Traffic routing is handled at the IP-pool level, so adjustments are immediate and don't require code changes.
SendPost connects via scoped API access and sits alongside your existing SendGrid setup. It handles event ingestion, IP pool routing, and delivery analytics without modifying your SendGrid configuration or historical data. See our full SendGrid integration documentation for technical details including API usage, event handling, and routing setup.
AI Suggest DM is SendPost's process for observing, diagnosing, and optimizing email delivery. It's the same process SendPost uses internally to operate SendX's production email at scale. During migration, AI Suggest DM identifies delivery risks, highlights provider-specific constraints, and recommends protective actions — all before any routing decisions are made.
Still have questions? We're here to help.
SendPost gives you visibility, control, and AI-powered routing for transactional and marketing email at scale.
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