Blog
Product updates, essays, guides, and practical resources from the AgentMail team.
Engineering · October 27, 2026
A Mailgun review for developers whose AI agent must receive and answer email: how Routes deliver replies, what store() keeps, retries, plans and the MCP server.
Essays · October 27, 2026
Claude found hidden email as often as other models but rarely replied to mail flagged as spam. What model defaults mean for AI agent email security.
Engineering · October 22, 2026
Should your agent reach its inbox through MCP, an SDK, the REST API or the CLI? Pick by who makes the call, then see one create and send task done all four ways.
Engineering · October 9, 2026
Compare 7 receive email APIs by delivery model, webhook payload, whether mail is stored, size limits, plan gating, and the best fit for each job.
Engineering · October 7, 2026
Compare 7 email APIs for an AI support agent on one address: how inbound arrives, who keeps the thread, retention, and what a single support inbox costs a month.
Engineering · October 9, 2026
AI agent emails going to spam? Check the authentication header, DNS records, domain age, content, and bounce rates in that order to find the layer that fails.
Engineering · October 15, 2026
Email parsing software compared: Parseur, Mailparser and Zapier pull fields into rows, while Mailgun, Postmark, SendGrid and AgentMail return parsed messages.
Engineering · October 20, 2026
Idempotent webhook handlers stop an email agent from replying twice: which ID to dedupe on, how to record events before acting, and how to key the reply send.
News · October 16, 2026
Connect a custom domain to AgentMail through Vercel or Cloudflare in a few clicks, with no DNS records to copy by hand. Built on Domain Connect and available through the API.
News · October 15, 2026
Every AgentMail inbox now includes a calendar. Agents book meetings, accept invitations, and get webhooks when meetings start and end. Live for every US organization.
Engineering · October 13, 2026
Send and receive email from the command line with no backend: create an agent inbox, send, read the reply and answer in thread using the AgentMail CLI or curl.
Engineering · October 12, 2026
Give each new customer a mailbox at signup three ways: a catch-all, a Google Workspace or Microsoft 365 seat, or an inbox API. Cost, setup time, retries compared.
Engineering · October 10, 2026
Sending email from an AI agent is solved. Receiving it is not: duplicate deliveries, broken threading, spoofed senders and no memory. Why a mailbox fixes all four.
News · October 6, 2026
AgentID is live. Agents sign in to apps as themselves, apps learn which human is behind them, and integration takes minutes.
Engineering · October 3, 2026
We put 25 AI agents to work on AgentMail, our own email API. Most handled it well. Where they failed shows what every agentic tool needs to get right.
Engineering · October 3, 2026
Set up Gmail MCP in Claude Desktop or Claude Code, cover OAuth scopes and API quotas, and know when a shared Gmail mailbox fails for agents.
Engineering · October 3, 2026
The 10 best MCP servers for AI agents in 2026, covering email, web research, code, docs, SEO data, and billing, with what each does and how to install it.
Engineering · October 1, 2026
Map eight email MCP servers by create-inbox, send platform, and person mailbox, with install paths for AgentMail, Resend, Postmark, Mailgun, and Gmail.
Developer Resources · October 1, 2026
What bring your own cloud (BYOC) means for AI agent infrastructure: hosted SaaS vs BYOC vs self-managed, what security reviews ask for, and why BYOC is rare in email.
Engineering · September 30, 2026
Ask your OpenAI dot to get an AgentMail address, approve the connection in the conversation, and it creates its own inbox in about a minute. No API key, no code. Then ten prompts that put the inbox to work.
Developer Resources · September 30, 2026
How an AI agent gets its own email address for signups: an AgentMail inbox it creates in one idempotent call, reads verification mail from, replies from, and uses as its AgentID at apps that accept it. Personal address vs catch-all vs agent inbox, with a Node example.
Engineering · September 28, 2026
Catch-all plus a database row is a bad pattern for agents that reply or scale. Create one inbox per agent for identity, reputation, and thread state.
Engineering · September 24, 2026
Give your sales, BDR, support, and security agents their own AgentMail inboxes. Use Jev to qualify prospects, route requests, and decide when you need to step in.
Engineering · September 17, 2026
Give your AI agents domains you own, decide which agents share a domain and which get their own, and run thousands of inboxes without bleeding.
Engineering · September 17, 2026
Install AgentMail MCP in Claude Code, Cursor, or Codex so your agent creates an inbox, sends mail, lists threads, and replies through typed tools.
Comparisons · September 15, 2026
Auth0 for AI Agents, Microsoft Entra Agent ID, WorkOS auth.md, Arcade, Nango, Descope, Stytch, and AgentID, sorted by the question each one answers: is the agent acting for a user, or is it the user? Pricing, protocols, and where the accountable human sits, cited from vendor pages.
Developer Resources · September 15, 2026
An agent ID is the identity an AI agent uses to sign in to apps: a stable subject, a credential only the agent holds, a verification path, and an accountable human. Microsoft Entra Agent ID is one implementation for enterprise tenants. AgentID by AgentMail is one for the open web. What AI agent identity should contain, and how the two differ.
News · September 12, 2026
AgentMail now supports usage-based billing for eligible enterprise customers. Pay for messages sent and received, plus inboxes, domains, and storage, with time-based resources billed for how long they exist.
Comparisons · September 11, 2026
Gmail was built for a person at a keyboard, not an agent running on a cloud VM at 5am. Give Meta Muse its own inbox with AgentMail and keep your personal Gmail out of it.
Engineering · September 11, 2026
Tell Muse to get an AgentMail address, paste an API key into its Secrets tab, approve the connection, and send a test. Five minutes, no code.
Engineering · September 10, 2026
An AI agent is enterprise ready when its limits hold without the model's cooperation. Six controls decide it: whitelisting, authentication, prompt injection screening, permissioning, multi-tenancy, and auditability. If a control depends on the model cooperating, it is not a control.
Essays · September 9, 2026
Apps cannot tell who is behind an agent. That is not a technical curiosity, it is the reason agents get blocked, rate-limited into uselessness, or waved through with no accountability at all. AgentID exists to fix it.
Engineering · September 9, 2026
Test inbound email webhooks before production with a throwaway AgentMail inbox, ngrok or WebSockets, Svix checks, then assert the payload fields.
Engineering · September 4, 2026
Trigger an AI agent when new mail arrives with AgentMail message.received, Svix verification, hydrate oversized bodies, then reply in thread.
Engineering · September 3, 2026
Build a human-in-the-loop AI email agent that sends routine replies, holds sensitive messages as AgentMail Drafts, and records reviewer decisions.
Developer Resources · August 28, 2026
Give Codex its own AgentMail inbox with one script that receives a task email, runs Codex in a sandbox, replies in the same thread, and cleans up.
Engineering · August 27, 2026
11 free email APIs for developers compared on send limits, inbound webhooks, inboxes, retention, and which free tiers stay permanent in 2026.
Developer Resources · August 25, 2026
Build an AI support agent that drafts approved replies, routes sensitive emails to a teammate, and handles AgentMail webhook retries safely.
Comparisons · August 25, 2026
Google is disabling Gmail accounts created by Grok Bot. Here is how to give your bot an email address the safe way, with AgentMail, the plugin already listed in the Grok Bot browser.
Engineering · August 22, 2026
AgentMail is an official Cursor plugin in Grok Bot. Install it, click Allow on the OAuth screen, and every bot gets 24 email tools. 3 minutes end to end.
News · August 21, 2026
Pay as you go is now live on AgentMail. Buy exactly the extra inboxes, custom domains, or monthly sends you need on top of Developer or Startup, one unit at a time.
Developer Resources · August 21, 2026
Mailgun is a transactional email API with a catch-all route and short-window MIME retention. AgentMail is built around the inbox as the primitive for AI agents, with framework connectors, prompt-injection defenses, and BYOC deployment. Here is what each one is built for, the agent loop in code, and how the routing, retention, threading, security, and pricing compare.
News · August 18, 2026
AgentMail is on ClawHub as an official OpenClaw plugin. It ships a CLI-backed AgentMail skill plus an email channel: inbound mail drives an agent turn and the agent replies in the thread, with a default-deny sender allowlist. Install it with one command.
Comparisons · August 5, 2026
Code-first agent orchestration frameworks compared on what breaks in production. We built the same three-step approval workflow in nine of these, killed the process while it was waiting for a human, and recorded what came back. Every framework held its state. Not one of them woke back up on its own.
Developer Resources · August 8, 2026
An anchor guide to email infrastructure for AI agents: what an agent inbox is, the reference architecture, how to operate one, how to run a fleet with isolation that holds, and how to decide what you actually need.
Comparisons · August 4, 2026
Yes. An AI agent can provision and operate its own email address with no human in the loop. Not a borrowed human inbox, not a shared team alias, but a real deliverable inbox the agent owns. How it works and why it matters more at enterprise scale.
Comparisons · August 2, 2026
What is the difference between an email API and an inbox API for AI agents? Send first tools push mail; an inbox API gives each agent an address, store, and threads.
Comparisons · August 7, 2026
A backend engineer can wire Amazon SES to a Lambda in a week. Getting to native threads, per-tenant isolation, and current Google/Yahoo/Microsoft deliverability is 10 to 16 engineer-weeks plus 7 to 10 weeks a year. When to build, when to buy, and what agent email infrastructure actually replaces.
Comparisons · August 7, 2026
Comparing Resend, Mailtrap, SendGrid, Twilio, Mailgun and AgentMail against three questions that decide the shortlist: API-created inboxes, native threading, and body retention. AgentMail is the best Mailgun alternative for agent inboxes.
Developer Resources · August 6, 2026
Three Clay + AgentMail GTM workflows you can build without code this week: reply-based outbound, AI SDR on deal threads, and a signal inbox that turns forwarded email into enriched rows.
Developer Resources · August 6, 2026
Learn how to implement email threading for an AI agent with persistent conversations, verified webhooks, thread retrieval, and idempotent replies.
Developer Resources · August 3, 2026
Build an AgentMail-powered CRM agent that receives buyer email, extracts sales context, updates Attio, and replies in the same thread.
Developer Resources · August 1, 2026
Mailtrap, Resend, and AgentMail compared for AI agent builders: inbound email, MCP tooling, SDK coverage, deliverability, and pricing.
News · July 22, 2026
One query, ranked results, and match attribution an agent can act on without reading a single message.
News · July 29, 2026
Run AgentMail's email infrastructure inside your own cloud. Your cloud, your email data, the same AgentMail API.
Developer Resources · July 26, 2026
Compare 14 inbound reply parsers for agent inboxes by provisioning, webhooks, reply extraction, thread ownership, and the best fit for each job.
News · July 13, 2026
AgentMail is now a native integration on the Vercel Marketplace. Give any project you deploy on Vercel a real inbox for its agents to send from, reply in, search, and react to. Provisioned from the Vercel dashboard, no separate account, no separate bill.
Essays · July 8, 2026
Adapted from our 2026 AI Engineer speech. My agent named itself InboxOrOblivion and dropped 40 posts about ephemeral labor. What that told us about identity, and why the entire industry is building the wrong thing.
Essays · July 10, 2026
Loops are the latest evolution of prompt engineering, and the marketing is way ahead of the engineering. Five definitions of "loop," what the good version actually looks like, and the four conditions that separate a real loop from an expensive way to skim.
Developer Resources · July 8, 2026
We built an identical agent in all nine major frameworks (Mastra, LangGraph, OpenAI Agents SDK, Vercel AI SDK, Pydantic AI, CrewAI, Claude Agent SDK, Google ADK, AutoGen/AG2) and ran ninety live tests. Rankings, install footprints, token overhead, and which framework fits which stack.
News · June 25, 2026
AgentMail is now a native source and action in Clay. Your tables can receive email, read it, and reply, without leaving the row. The reply that used to disappear into a mailbox now lands as a row you can enrich, classify, and answer from.
News · June 23, 2026
AgentMail has partnered with Telnyx. When an AI agent signs up for Telnyx without an email address of its own, it now gets one by default: a Telnyx Agent Inbox, powered by AgentMail.
Essays · June 19, 2026
I help build the infrastructure that floods your inbox. Here is how I stopped being the human who receives any of it.
Developer Resources · June 13, 2026
AgentMail ships an official LangChain integration. One pip install gives any LangGraph agent its own inbox to send from, reply in, search, and react to.
Developer Resources · June 9, 2026
One command per coding agent. Setup for Claude Code, Cursor, Codex, OpenClaw, Replit, Vercel, Lovable, and Hermes plus the universal SDK fallback.
Developer Resources · June 11, 2026
Every AgentMail inbox can now be read by any standard email client or library over IMAP. Here is what IMAP is, why it matters for agent inboxes, and how to connect one.
Developer Resources · June 4, 2026
Nine email APIs grouped into five categories. Which one fits which agent shape, and why AgentMail sits in its own category.
Developer Resources · June 2, 2026
Postmark is a transactional email service with a strong inbound webhook. AgentMail is built around the inbox as the primitive for AI agents. Here is what each one is built for, the agent loop in code, and how the pricing and skills compare.
Developer Resources · May 29, 2026
The Gmail API gives applications access to a Gmail user's existing inbox through OAuth. AgentMail gives AI agents their own inboxes through a single API. Here is what each one is built for, the agent loop in code, and how the quotas and pricing compare.
Developer Resources · May 27, 2026
Nylas connects to a human user's existing inbox across six providers and recently added a Nylas-hosted mailbox in beta. AgentMail is built around the inbox as the primitive for AI agents. Here is what each one is built for, the agent loop in code, and how the pricing compares.
Developer Resources · May 25, 2026
The output format AI agents use is more consequential than it sounds. Token costs, security risk, comprehension, and audit trail depend on it. Here is how to decide.
Developer Resources · May 22, 2026
Most AI coding agents are not truly autonomous yet. Recent reliability research and the structural reason why: identity.
Developer Resources · May 20, 2026
A complete guide to building production email agents: why email, technical foundations, architecture patterns, deployment, and real-world use cases.
Developer Resources · May 8, 2026
SendGrid is a sending pipe. AgentMail is an inbox. Here is what each one is built for, what the agent loop looks like in code, and how the multi-tenancy and pricing compare.
Developer Resources · May 6, 2026
Cloudflare launched Email Service for agents in April 2026. Here is what they shipped, what AgentMail does differently, and when each one fits.
Developer Resources · May 4, 2026
Every infrastructure layer eventually grows up for multi-tenancy. Email was the last one. Pods give each tenant isolated inboxes, a domain, and scoped keys.
Developer Resources · April 30, 2026
Resend Inboxes are shared team inboxes on your own domain, with an AI agent that drafts for humans. AgentMail inboxes belong to the agent. Domains, the agent loop, security, pricing, and code for both.
Developer Resources · April 24, 2026
Amazon SES for AI agents is send plus raw MIME receive, not an inbox. AgentMail is managed inbox. Compare seven loop steps, build cost, when SES wins.
Developer Resources · April 18, 2026
Most email agents start with polling. Here is why that creates problems at scale and how to switch to webhooks in four steps.
News · April 13, 2026
AgentMail is live on Replit as a connector: programmable inboxes, threads, and Mastra-generated tools so every agent can send, receive, and remember email.
Developer Resources · April 9, 2026
Native AgentMail in Sim Studio: 21 canvas operations for inboxes, threads, drafts, and messages, no OAuth. Plus a full tutorial for a daily newsletter intelligence workflow with schedules, loops, and LLM extraction.
Developer Resources · April 7, 2026
Wire AgentMail to Hermes via MCP: typed tools at startup, per-subagent inboxes, CLI setup, config.yaml, and how it differs from OpenClaw’s SKILL.md pattern-without SMTP or OAuth.
Developer Resources · April 7, 2026
How to wire Google's ADK into AgentMail's MCP server so your agents can send and receive email without touching SMTP or OAuth. Python setup, stdio transport, and a few things worth knowing before you ship it.
Developer Resources · April 3, 2026
Browser Use and AgentMail are partnering so every cloud session gets its own inbox. Signups, OTPs, and verification links without a human.
Developer Resources · March 30, 2026
Gmail often disables accounts used by AI agents: rate limits, OAuth patterns, and spam signals treat automation as abuse. Learn common triggers, why appeals usually fail, and how to migrate automated email to AgentMail with API keys and webhooks.
Comparisons · March 16, 2026
AgentMail, Gmail, Resend, SendGrid and Mailgun compared for OpenClaw agents: two-way inboxes, threading, persistent context, and what actually breaks in production.
News · March 10, 2026
AgentMail has raised a $6M seed round led by General Catalyst. Learn why we're building email inboxes for AI agents and what's next.
Essays · March 6, 2026
Agents are discovering AgentMail on their own, signing up autonomously, and sending us support emails. So we built a CLI for them.
Developer Resources · March 1, 2026
Discover how email provides AI agents with persistent identity, authentication capabilities, and verifiable sender credentials. Learn why email is the foundational identity layer that enables agents to participate in digital systems.
Developer Resources · February 20, 2026
Learn how to connect your OpenClaw agent to Gmail with three methods: gogcli skill, OAuth integration, and Pub/Sub webhooks. Includes setup guides, security best practices, and when to use AgentMail instead.
Developer Resources · February 7, 2026
Seven OpenClaw email automations running in production: support triage, signup verification, invoice processing, lead follow-up, daily briefings and OTP delivery.
Comparisons · February 6, 2026
Should your OpenClaw agent use Gmail or a dedicated inbox? Setup, ban risk, OAuth, pricing at scale, and the migration path, compared side by side.
Developer Resources · February 5, 2026
Why AI agents need persistent memory and how email inboxes provide semantic, episodic, and procedural memory without building custom infrastructure.
Developer Resources · February 4, 2026
Create a dedicated inbox for your OpenClaw agent: programmatic setup, OTP and verification handling, threading and webhooks. No Google account, no OAuth consent screen.
Comparisons · January 27, 2026
With so many email API providers out there, picking the right one can be tough. We compare AgentMail, Mailtrap, Resend, SendGrid, Mailgun, and Amazon SES.
Comparisons · January 26, 2026
AI agents that send email need more than basic APIs. Gmail pricing doesn’t scale, and most API tools like Sendgrid weren’t built for autonomous inboxes. Here’s what to look for.
Developer Resources · January 17, 2026
Why do AI agents need email? From authentication to two-way communication, email infrastructure enables agents to function as first-class internet citizens.
Developer Resources · January 15, 2026
A high-level, engineering-first guide to why emails land in the inbox (or don't).
News · August 15, 2025
LiveKit and AgentMail are partnering to give voice agents their own email inboxes.
News · August 8, 2025
AgentMail is an email infrastructure built for AI agents. Create inboxes, send and receive messages, and search threads programmatically, built for autonomous workflows.
Prompt
Give yourself access to AgentMail by following the guide at:
https://agentmail.to/docs/get-started/agent-signup
and refer to:
https://agentmail.to/llms.txt
for the documentation index.
Start integrating AgentMail into your AI agents today.
