About
Building an AI agent has never been easier. Pick a framework, wire up an LLM, give it some tools, deploy. You can go from zero to a working prototype in an afternoon.
Then you hit the email step, and everything stalls.
Say you've just built a payment infrastructure Q&A agent. It can read documentation, answer support tickets, and walk a developer through a failed webhook. But it can't do any of that if it never receives the email in the first place. Or say you've shipped an outbound sales agent that drafts personalized follow-ups. Great, until every message it sends lands in spam.
Email isn't a nice-to-have for AI agents. It's how your agent actually talks to the outside world. And right now, giving an agent a proper email setup is way harder than it should be.
We built OpenMail to fix that.
The email gap in the agent stack
The AI agent ecosystem has matured fast. We have orchestration frameworks, vector databases, tool-use protocols, evaluation harnesses. But email — the single most universal communication channel on the internet — is still an afterthought.
Here's what usually happens when you try to give your agent an email address:
You grab a generic inbox.
Maybe you create a Google Workspace account. That's $7/user/month at minimum, and it goes up to $22/month if you need anything beyond the basics. Scale that across ten agents and you're paying over $200/month just for email accounts that weren't designed for programmatic use. Your agent ends up as “sarah.test.47@gmail.com,” there's no separation from the rest of your domain, no audit trail, and no real control over what happens when a message arrives.
You try an email API.
Services like SendGrid or Postmark are built for transactional email: password resets, receipts, notifications. They're not designed for agents that need to receive, read, understand, and respond to messages as part of an ongoing conversation. They solve delivery. They don't solve identity.
You roll your own.
You set up Postfix, configure DKIM and SPF, build an ingestion pipeline, write parsing logic for attachments, handle bounce management, and hope your IP doesn't get blacklisted in the first week. It works, technically. It also takes weeks and requires ongoing maintenance that has nothing to do with your agent's actual job.
None of these paths give you what you actually need: a dedicated, production-ready email identity for an AI agent that just works.
What OpenMail does
OpenMail is email infrastructure purpose-built for AI agents. We give every agent a dedicated inbox with a custom domain, full send and receive capabilities, and the tooling to make that inbox useful from day one.
Four things make this different from stitching together existing tools: dedicated identity, custom domains on every plan, structured email history for agent context, and managed deliverability out of the box.
Identity, not just an address
An AI agent isn't a notification system. It's something that takes actions, holds conversations, and represents your organization. It needs an email identity that reflects that.
When you set up an agent on OpenMail, it gets a proper inbox tied to your brand. Not a shared mailbox, not a forwarding alias, not a subdomain of someone else's infrastructure. A dedicated inbox on your domain that acts as the agent's identity on the internet.
This matters. When your agent emails a customer, a vendor, or another service, the address it sends from shapes how the recipient treats it. “accounts@yourcompany.com” lands very differently than “noreply@random-saas-tool.io.”
Custom domains included, not upsold
Most email providers treat custom domains as a premium feature. Some charge per domain. Others make you upgrade to an enterprise tier before you can even configure DNS records.
We include custom domains on every plan. Your agents should send and receive from your domain. That's table stakes, and we don't think you should pay extra for it.
Setup takes minutes: point your DNS records, verify, and your agent is live.
Structured email history as context
If you're building agents, you know the hardest part isn't generating a response. It's giving the model enough context to generate the right response. An agent handling a support thread about a billing issue from two weeks ago is useless if it can't access the prior conversation and the invoice PDF that was attached.
OpenMail gives your agent its full email history as structured data. We parse message bodies, extract and index attachments, and organize threads so you can feed prior interactions directly into your agent's context window. Think of it as RAG over your agent's inbox, available through our API with no extra pipeline to build.
Your agent doesn't start every conversation cold. It has the full thread, the attachments, and the history. That's the difference between generating a plausible response and generating a correct one.
Deliverability that's handled for you
Here's a scenario that kills agent deployments quietly: everything works in testing, you go to production, and your agent's emails start landing in spam. Open rates drop. Customers never see the responses. The agent looks broken even though it's working fine.
Email deliverability is a reputation game, and new inboxes start with no reputation. Building it requires consistent sending patterns, proper authentication records, gradual volume ramps, and ongoing monitoring. Most teams don't have the bandwidth to manage this, and honestly, it's not what you should be spending your time on.
We handle all of it. Every OpenMail inbox comes pre-warmed and continuously monitored. SPF, DKIM, and DMARC are configured out of the box. We manage sending reputation proactively so your agent's emails reach the primary inbox, not the spam folder.
You focus on what your agent does. We make sure its emails actually get delivered.
Who this is for
If you're building AI agents that communicate over email, OpenMail is the infrastructure layer you'd otherwise have to build yourself. That includes:
- Support agents that handle tickets from a branded inbox
- Sales agents that run outreach sequences without deliverability problems
- Ops agents that process invoices and coordinate with vendors
- Internal agents that replace shared inboxes for HR or IT requests
If your agent touches email, OpenMail gives it the infrastructure to do that reliably.
Why we built this
We kept hitting the same wall. Every time we built an agent that needed email (which was most of them) we'd spend days on plumbing that had nothing to do with the agent's core capabilities. Configure SMTP. Set up receiving webhooks. Deal with authentication records. Warm the inbox. Parse attachments. Handle bounces.
Same work every time, always more painful than it should have been. The tools that exist today were built for humans sending transactional emails or marketing campaigns. They weren't built for software that needs to operate its own inbox.
So we built what we kept wishing existed. An email layer designed for AI agents, where identity, deliverability, and memory are defaults instead of things you bolt on after the fact.
Get started
OpenMail is live. Set up your first agent inbox in minutes.