OpenMail is email infrastructure built for AI agents. One CLI command or API call creates an inbox. Your agent can then send email, receive replies, read full threads, and parse attachments. Inbound mail arrives via webhooks or WebSocket, so your agent never polls. Scoped keys and sender allowlists limit what each agent can reach. It suits developers building support agents, signup automation, or document workflows that need two-way email. There's a free plan and EU hosting.

• One Inbox per Agent: Each agent gets its own address instead of a shared inbox or forwarding rule. A single API call or CLI command creates it.
• Real-Time Inbound Delivery: New mail reaches your handler through webhooks or WebSocket, so your agent reacts right away without polling. The OpenClaw plugin keeps the WebSocket inside the gateway, so you don't need a public URL.
• Two-Way Threading: Replies stay in the same thread. Customers answer from their normal email client, and your agent gets each message with full context.
• LLM-Ready Attachments: PDFs, CSVs, images, and Office files are turned into text your model can read. Supported formats are PDF, CSV, PNG, JPG, XLSX, DOCX, JSON, and TXT.
• Scoped API Keys: Keys can cover the whole account, a pod (a group of inboxes), or one inbox. An inbox key can't create keys, delete inboxes, change webhooks, or edit policy, so a compromised agent can reach very little.
• Sender Allowlists and Audit Logs: Control which email addresses and domains can send to or receive messages from your agents. OpenMail supports address, domain, and wildcard subdomain rules. Its audit logs record policy changes and refused messages.
• Built-In Email Authentication: OpenMail handles DKIM, SPF, and DMARC configuration and includes suppression lists across its plans. Pro and Enterprise plans also support custom domains.
• AI Agent Integrations: Connect OpenMail to OpenClaw, Hermes Agent, Claude Code, LangChain, n8n, Make, and the Vercel AI SDK. A hosted MCP server, REST API, CLI, and developer tools provide additional ways to integrate email into AI applications.

• Fast Setup: You can create an inbox with one command or API call and send your first email in minutes, with no credit card needed to start.
• Built for Two-Way Conversations: OpenMail is built for agents that read and answer replies, unlike transactional senders that focus on outbound mail.
• Fine-Grained Security Controls: Scoped keys, allowlists in both directions, and an append-only audit trail let you limit what each agent can do.
• Affordable Entry-Level Pricing: The free plan includes three inboxes and 3,000 emails per month. Pro starts at €9/month, with additional usage charged separately.
• EU Hosting on Every Plan: Your email data is hosted in the EU, which helps if you have European data requirements.
• Broad Agent Ecosystem Support: Native plugins, an MCP server, and LangChain and n8n integrations mean you rarely need to write glue code.

• Free Plan Restrictions: The free tier caps sending at 100 emails a day, adds an OpenMail footer, and only supports openmail.sh addresses. Production use on your own domain requires Pro.
• Dedicated IPs Only on Enterprise: Free and Pro send from shared IPs. Teams that want to fully control their sending reputation need a custom Enterprise contract.
• SOC 2 Still in Progress: The site lists SOC 2 as in progress, so buyers who require a completed audit report today may need to wait.
• Developer-Focused Setup: You work through the API, CLI, plugins, and webhooks, so non-technical teams will need a developer to set it up.

• Signup and Verification Automation: Give your agent an inbox so it can receive OTP codes, verification links, and 2FA emails on its own. Account creation and login flows then run without a person checking an inbox.
• AI Support Inbox: Point customer email at an agent inbox. The agent triages each message, replies in thread, and keeps the conversation history, with no separate ticketing system.
• Invoice and Document Processing: Forward invoices, receipts, or PDFs to a dedicated agent address. OpenMail turns the attachments into readable text, and your agent can return the extracted data as JSON for your finance or ops pipeline.
• Multi-Agent Workflows: Give each agent in a fleet its own address and group the inboxes into pods with scoped keys. Each agent handles its own mail without reaching the others' inboxes.
• No-Code Email Automations: Connect OpenMail to n8n or Make so incoming emails trigger workflows and automated replies.
• Coding-Agent Email Access: Use the hosted MCP server or the Claude Code skill so assistants like Claude, Cursor, or Codex can send and read email during a task.