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OpenMail

09 agent-services/OpenMail/ACTIVE

OpenMail provides dedicated email inboxes for agents, incoming-message events, sender rules, and attachment extraction.

SEC.01

What it does

  • 01Per-agent inboxes
  • 02Webhooks and WebSockets
  • 03Sender allow/block rules
  • 04Attachment text extraction
  • 05REST API and CLI
  • 06Custom domains on paid plans
SEC.02

Who it's for

An agent that needs its own address and a way to process incoming documents or replies.

PRICING

Pricing

Free: 3 inboxes / 3,000 emails per month; Pro: €9/month plus usage, 10 inboxes / 10,000 emails (checked October 12, 2026). List prices as checked against the vendor's pricing page on 2026-10-12; plans change often, so confirm before deciding.

caveat · before you adopt

OpenClaw defaults to automatic replies in channel mode. Sender filtering permits unblocked mail by default; denied inbound mail is dropped without quarantine. Choose the mode and sender policy before connecting a live inbox. Documentation reviewed October 12, 2026; no hands-on delivery benchmark.

ALT

Other agent services (19)

AgentMail

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api · cloud · Free: 3 inboxes / 3,000 emails per month; Developer: $20/month, 10 inboxes / 10,000 emails (checked October 12, 2026)

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Nevermined

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AgentCard

AgentCard · agent-services

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Keycard

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Arcade

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Scalekit

Scalekit · agent-services

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Composio

Composio · agent-services

api · local/cloud · Free tier; usage-based (verify)

E2B

E2B · agent-services

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Browserbase

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Exa

Exa · agent-services

api · cloud · Free tier; per-request pricing

Mem0

Mem0 · agent-services

api · local/cloud · Free OSS; cloud tiers (verify)

Nylas

Nylas · agent-services

api · cloud · Free tier; Essentials: $15/month, with separate Connect and Agent Accounts allowances (checked October 12, 2026)

Resend

Resend · agent-services

api · cloud · Transactional Free: 3,000 emails/month, 100/day; Pro: $20/month for 50,000, plus overages. Counts sent and received mail; each To, Cc, and Bcc recipient counts separately (checked October 12, 2026)

Postmark

Postmark · agent-services

api · cloud · Free developer tier: 100 emails/month; Pro with inbound processing: $16.50/month at 10,000 emails (checked October 12, 2026)

Daytona

Daytona · agent-services

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FAQ

Frequently asked

What is OpenMail?

OpenMail provides dedicated email inboxes for agents, incoming-message events, sender rules, and attachment extraction.

Who is OpenMail for?

An agent that needs its own address and a way to process incoming documents or replies.

How much does OpenMail cost?

Free: 3 inboxes / 3,000 emails per month; Pro: €9/month plus usage, 10 inboxes / 10,000 emails (checked October 12, 2026). List prices as checked against the vendor's pricing page on 2026-10-12; plans change often, so confirm before deciding.

Does OpenMail run locally or in the cloud?

OpenMail runs in the vendor's cloud. Its interfaces are an API or protocol.

What are alternatives to OpenMail?

Other agent service entries in the catalog: AgentMail, x402, Agent Payments Protocol, Skyfire, Payman, Nevermined, AgentCard, Keycard, Arcade, Scalekit, Composio, E2B, Browserbase, Exa, Mem0, Nylas, Resend, Postmark, Daytona. Different categories solve the same problem differently — see the Agent services category page for tradeoffs.

What should I know before adopting OpenMail?

OpenClaw defaults to automatic replies in channel mode. Sender filtering permits unblocked mail by default; denied inbound mail is dropped without quarantine. Choose the mode and sender policy before connecting a live inbox. Documentation reviewed October 12, 2026; no hands-on delivery benchmark.