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UGMail is an email infrastructure platform designed from the ground up for programmatic control. Whether you’re an indie developer automating a SaaS onboarding flow, an enterprise team managing hundreds of client domains, or an AI engineer giving your agents a real inbox, UGMail gives you the API primitives to build exactly what you need — without paying per seat or fighting with legacy email hosting panels.

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What UGMail is

UGMail sits between you and the complexity of raw email infrastructure. You interact with a clean REST Management API secured by Bearer token authentication; UGMail handles the MTAs, DKIM signing, spam filtering, and protocol servers underneath. Every resource — domains, mailboxes, aliases, forwarders — is a first-class API object you can create, update, and delete at any time.

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Key features

API-driven provisioning. Create domains and mailboxes with a single POST request. No web-panel clicking, no waiting on support tickets. Automate onboarding, teardown, and everything in between using curl, Python, Node.js, or any HTTP client. Seven open protocols. Connect mail clients and applications using the protocol that fits your stack. SMTP, IMAP, POP3, JMAP, CalDAV, CardDAV, and WebDAV are all available at mail.ugmail.co on standard ports. No per-user fees. UGMail charges for infrastructure, not headcount. Spin up one mailbox or ten thousand — the pricing model scales with your platform, not your user list. 99.99% uptime SLA. UGMail’s redundant infrastructure and tenant-scoped isolation mean your email keeps flowing even when traffic spikes. Every tenant’s data and delivery pipeline is isolated from every other tenant.

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Who UGMail is for

UGMail is the right tool for teams and developers who need to own their email infrastructure, not rent a shared black box. Common use cases include:
  • SaaS onboarding automation. Provision a dedicated mailbox the moment a user signs up, then tear it down or hand it off when they churn. The entire lifecycle lives in your application code.
  • AI agent email. Give autonomous agents a real SMTP/IMAP inbox so they can send, receive, and process email as part of a larger workflow — no forwarding hacks or shared accounts.
  • Multi-domain client management. Agencies and MSPs can manage hundreds of client domains under a single API token, with full isolation between tenants.
  • Transactional and notification email. Use the SMTP relay with your own domain and DKIM records to send transactional messages with top-tier deliverability.

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Next steps

Quickstart

Get your token, add a domain, and send your first email in under a minute.

Authentication

Learn how Bearer token auth works and see code examples in three languages.

API Reference

Browse every Management API endpoint with request and response schemas.

Protocols Overview

Learn the server addresses and ports for SMTP, IMAP, JMAP, and more.
Last modified on July 17, 2026