SendPost helps ESPs manage SMTP, APIs, and IPs all in one place, with full visibility into email deliverability.

SendPost is a cloud-based email delivery engine built for ESPs. It gives deliverability and engineering teams full control and visibility across every client’s email sending, all in one place.
With SendPost, ESPs can:
-Manage SMTPs, APIs, IPs, and reputation seamlessly
-Automate IP warm-ups, throttling, and monitoring
-Get real-time insight into every IP, domain, and provider

ESPs using SendPost consistently achieve:
-95–98% delivery success across all major mailbox providers
-90–95% warm-up success rates through automated ramp-ups
-Root-cause diagnosis in under 15 minutes (vs. hours before)
-3X lower infrastructure costs compared to legacy MTAs

It's built for scale.

You can send hundreds of millions—or even billions—of emails reliably, without increasing your team size.