# Scale your sending with Momentum MTA

Customize and scale your email sending with Bird's powerful Momentum MTA.

## Adaptive Delivery keeps your mail moving.

Every mailbox provider pushes back differently, throttling, deferring, or rejecting mail when you send too fast or your reputation slips. Momentum reads those signals as they happen and adjusts on its own: slowing connections to a provider that's straining, holding messages to retry later, or pausing a stream until an issue clears, then resuming. You reach the inbox by respecting each provider's limits instead of hammering them, and your team can see exactly what was throttled and why. It's the same deliverability discipline behind the hosted Bird Email API, running on infrastructure you operate.

## Run it wherever you need to.

Momentum runs on your own hardware, on any major cloud, or split across both. Keep message generation in your data center for control or compliance and burst to the cloud for peak load, or move the whole operation to the cloud and back as your needs change. Because you own the deployment, there is no vendor lock-in and no rip-and-replace to get started.

## Prefer email without the infrastructure?

The hosted Bird Email API gives you sending, deliverability, dedicated IPs, suppression, and analytics out of the box, the same email expertise as Momentum, without running the servers yourself.