Description
OpenMail offers a specialized email API designed specifically for AI agents, providing them with dedicated email addresses and the infrastructure to manage email communications autonomously. This platform allows developers to create individual inboxes for each AI agent through a simple API call or CLI command, facilitating real-time sending and receiving of emails.
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A core capability of OpenMail is its real-time inbound delivery, which can be configured via webhooks or WebSocket. This ensures that agents receive incoming emails instantly, with attachments automatically parsed into LLM-ready text, eliminating the need for manual file handling. The service supports full email threading, allowing agents to maintain conversation context and reply within existing email threads, making interactions feel natural to human recipients.
OpenMail is built to address the unique challenges AI agents face with traditional email services, such as deliverability issues and the lack of dedicated inboxes. It automatically configures DKIM, SPF, and DMARC for every inbox, managing sending reputation to ensure emails land in the primary inbox rather than spam. Custom domains are supported on higher-tier plans, enabling agents to send and receive emails from a branded address.
The platform integrates seamlessly with popular AI agent frameworks and tools, including LangChain, n8n, Make, Vercel AI SDK, OpenClaw, and Hermes. This broad compatibility means that any agent capable of making an HTTP request or running a CLI can leverage OpenMail's email capabilities. Use cases span from AI customer support, where agents can handle tickets, read thread history, and reply autonomously, to AI sales outreach, enabling agents to send personalized emails, manage follow-ups, and continue conversations in context.
OpenMail offers a free tier with 3 inboxes and 3,000 emails per month, with no credit card required. Paid plans, starting at €9/month, provide more inboxes, higher email volumes, custom domains, and usage-based overage options. The service is developed by UAB All Systems Operational, founded in 2026 in Vilnius, Lithuania, and operates with EU data residency on all plans, ensuring GDPR compliance.
- CategoryAI Email Assistants
- Pricing ModelFreemium
- DeploymentCloud
- PlatformsWeb
OpenMail's Core Features
Dedicated email address per AI agent
Send and receive email via REST API
Real-time inbound email via webhooks or WebSocket
Full email threading support for contextual replies
Attachment parsing to LLM-ready text (PDF, CSV, images, DOCX)
Custom domains available on Pro plan and above
Automatic DKIM, SPF, DMARC configuration for deliverability
CLI for terminal-based inbox setup
Integration with LangChain, n8n, Make, Vercel AI SDK, OpenClaw, Hermes
Managed sending reputation to avoid spam folders
Multiple inboxes per account with unique IDs for routing
EU-based hosting with GDPR compliance
Usage-based pricing with no daily send limits on paid plans
Monthly spending cap option for cost control
No "Sent with OpenMail" footer on paid plans
How to use OpenMail?
Install CLI: Install the OpenMail CLI globally using npm.
Create Inbox: Run `openmail init` or call the POST /v1/inboxes API to create a dedicated email inbox for your agent.
Configure Inbound: Set up webhooks in the Dashboard or open a WebSocket connection to receive inbound emails in real time.
Integrate Agent: Use OpenMail plugins for OpenClaw or Hermes, or integrate directly with other agents via HTTP requests or CLI.
Send & Receive: Enable your AI agent to send emails and receive replies, utilizing full thread history and parsed attachments.
Manage Domains: For custom domains, point your DNS records and verify them in the Dashboard (Pro plan and above).
OpenMail's Use Cases
- AI Customer Support
- AI Sales Outreach
- Email Verification API
- Agent Communication
- Automated Follow-ups
- Inbound Lead Handling
- Re-engagement Campaigns
- Partner Coordination
