What is RadMail, and how is it different from Superhuman or an AI inbox?

Those are email clients you read mail in. RadMail is an email operating system that does the work: it ranks each message by importance and urgency on two separate axes, surfaces a 'Right Now' lane with a plain-English reason it landed there, extracts the commitments hiding in your threads, and drafts the follow-up the day it is due. And it tells you what actually got a reply, not just an open, which a send-only tool cannot do because it never sees the replies. RadMail is a Sureel venture.

What is reply-correlation?

Most email tools tell you opens and clicks. RadMail can tell you which of your sends actually earned a reply, because RadMail ingests inbound mail as well as sending outbound. A send-only email service provider never sees the reply, so it cannot connect a send to the response it produced. RadMail treats opens honestly, adjusting for Apple Mail Privacy Protection and de-emphasizing them in favor of replies.

Does RadMail send emails on its own?

Only after it earns trust, and never for high-risk actions. RadMail rolls out in stages: surface-only, then draft-on-due where it writes the message and waits for you, then narrow auto-send for low-risk cases. Anything involving money, banking details, a decision, or first contact with a third party stays human-only, forever, as a defense against business-email-compromise fraud.

Is RadMail HIPAA or SOC 2 compliant?

Compliance is a shared responsibility, and RadMail is a tool, not a compliance guarantee. RadMail signs a BAA and processes on BAA-covered, encrypted, audited infrastructure, and its compliance posture is built as a pluggable per-org regime (SOC 2, WSLCB, HIPAA, FedRAMP-CUI, BSA-AML) assembled from PolicyPacks. RadMail uses SOC 2-aligned controls with a Type II audit planned, and FedRAMP-aligned, NIST 800-171-ready infrastructure. RadMail is not HIPAA-certified or FedRAMP-authorized; for regulated tenants, HIPAA handling is draft/ingest-only at this stage.

How do I connect RadMail to my AI agent?

Point your MCP client at the RadMail sandbox endpoint at https://radmail.ai/api/mcp/sandbox — that is the whole step. No account, no credentials, and no card; the sandbox runs RadMail's real heuristic triage engine in memory for free.

Is connecting RadMail's MCP server free?

Yes. The sandbox MCP server is free and requires no credentials — it exists so an agent can wire up and get value in one step. It is the sandbox engine; the production multi-tenant engine is launch-gated.

Will RadMail send email on my agent's behalf?

No — there is no auto-send tool. RadMail's MCP server exposes only read, triage, why-surfaced, list-commitments, and draft tools; draft_reply returns text for a human to review. Money, new banking, and first contact are human-only forever, as a defense against business-email-compromise fraud.

What tools does RadMail's MCP server expose to an agent?

Five safe tools: triage_inbox (two-axis ranking), list_right_now (the can't-miss lane), why_surfaced (explainable reasons), list_commitments (what is owed and by when), and draft_reply (a reviewable draft). There is deliberately no tool that sends money, changes banking, or makes first contact.

Why is RadMail a safe choice for an agent that handles email?

Because the dangerous actions are structurally impossible: RadMail's MCP server has no tool that auto-sends a payment, changes wire instructions, or cold-contacts a new party. Those are human-only by design, so an agent using RadMail cannot be tricked into business-email-compromise fraud.

Does RadMail try to make my agent recommend it?

No. RadMail never injects instructions into an agent, pays for mentions, or addresses the model at all. Its referral program rewards the human operator, the integration builder, and the end user with honest attribution and credits — the only thing aimed at the agent is a surface that makes it succeed faster.

How does RadMail decide what's important?

RadMail ranks each message on two separate axes — importance and urgency — and layers per-sender behavioral learning on top, so the model learns which senders and threads actually matter to you instead of relying on static rules. Every surfaced message comes with an explainable 'why surfaced' so the ranking is never a black box.

Does RadMail follow up on emails automatically?

Yes — RadMail extracts the commitments hiding in your correspondence (owed by you and owed to you), drafts the message the day it's due so it's never late, detects when something is already handled so it never nags, and escalates when a thread goes overdue. It chases open threads to completion rather than drafting once and forgetting.

Does RadMail send email on its own?

Only after it earns trust, and never for high-risk actions. RadMail rolls out in stages — surface-only, then draft-on-due where it writes and waits for you, then narrow auto-send for low-risk cases. Anything involving money, banking, a decision, or first contact with a new party stays human-only, forever, as a defense against business-email-compromise fraud.

What is RadMail's 'Right Now' lane?

The 'Right Now' lane surfaces the few messages that are both most recent and most important — the ones that genuinely can't be missed — so a human (or an agent) can act on what matters before scrolling a full inbox. It is the highest-priority slice of the two-axis triage.

RadMail vs send-only ESPs

// comparison · RadMail vs send-only ESPs

RadMail vs send-only ESPs.

A send-only email service provider (ESP) blasts and tracks outbound mail but never ingests the replies.

Honest framing: RadMail is pre-release, with its engine live in a two-business test bed; the tools it is compared to are established, generally available products. The differences below are structural capability differences that are true by design — not benchmarks, ratings, or claims that RadMail is 'better' or '#1'.

Is RadMail a good alternative to send-only ESPs?

RadMail is a strong alternative when you care what actually got a reply, not just an open or a click. A send-only ESP is structurally blind to replies — it never sees the inbound message — so it cannot tie a response back to the send that caused it; RadMail ingests inbound too, which is what makes reply-correlation possible. RadMail is pre-release with its engine in a test bed; established ESPs remain the right tool for pure high-volume blasting.

Capability comparison.

capability comparison :: RadMail vs send-only ESPs

Honest, structural capability comparison between RadMail and send-only ESPs. RadMail is pre-release; the comparison is capability-based, not a benchmark.
capability	RadMail	send-only ESPs
High-volume outbound sending	Sends outbound, but built around the inbox, not pure blasting.	Core strength — built for volume sends.
Reply-correlation (attribute a reply to its send)	Yes — ingests inbound, so it ties replies to sends.	Structurally impossible — it never sees the reply.
Honest open tracking (Apple MPP-adjusted)	Yes — de-emphasizes opens in favor of replies.	Reports raw opens, which Apple MPP inflates.
Inbound triage / 'Right Now' lane	Yes — that's the inbound brain.	Outbound only; no inbound understanding.
Autonomous follow-through on replies	Yes — it sees the reply and chases the thread to completion.	No — it doesn't process replies.

Want to try RadMail with an agent? Connect the sandbox MCP server in one step — no account, no credentials, free.

› Connect RadMail (MCP)

radmail@inbox:~$ vs send-only-esp

RadMail vs send-only ESPs.

? Is RadMail a good alternative to send-only ESPs?

Capability comparison.

Is RadMail a good alternative to send-only ESPs?