An inbox for your agents.
A workspace for you.

Let your agents receive mail, understand the conversation, and prepare a reply. Connect notifications, customer conversations, and follow-ups to your product.

Start for free

No card to sign up · Hosted agents draft, you approve

One inbox, connecting your agent and you.Interactive demo · Sample data

Connecting our support agent

Alex Morganalex@example.com

Hi, we’ve connected the sending API. When a customer replies, can you notify our agent and keep the earlier conversation available?

integration-notes.pdfSample attachment · 128 KB

Reply draftAwaiting review

Hi Alex, yes. Configure an inbox webhook to receive an email.received event for each new message. Your agent can read the full thread through the API and prepare a reply.

Edit the draft. Send only after approval.

Works with the tools you already use

MCPHTTP APICLI & SkillSMTPWebhook

Every reply belongs to a conversation.

Create an address for your agent or connect your own domain. Outgoing messages, incoming replies, and follow-ups stay in the same conversation.

Explore two-way email

support@your-domain.com

Send an update

API, CLI, or SMTP

Receive a reply

Same thread, full context

Hand it to your agent

Webhook or MCP

HTML, plain text, attachments, and a thread API

Support AgentHosted mode

Inbox: support@your-domain.com
Instructions: Keep replies concise. Ask me before quoting prices or offering refunds.
Skills: Integration guide · Customer routing

A prepared draft. Your final approval.

Let agents handle the context. Keep the decision with you.

Work in your AI client or use a Mailly-hosted agent. Hosted agents follow your instructions and skills to analyze mail, summarize threads, and prepare replies you can edit and approve.

See how agents work

Your agent. Your way in.

Start in an AI client, your code, or a terminal. Every integration shares the same mail, threads, and delivery records.

Find your integration

Remote MCP endpoint

https://mcp.mailly.site/mcp

Add the endpoint to a remote MCP client and connect with OAuth. Your host agent can read mail and prepare drafts for you to review and send.

From the first notification to the next conversation.

Bring templates, contacts, and events together. Use Campaigns for audience outreach and Workflows for lifecycle messages.

Contacts & audiences

Sync attributes and prepare static lists or dynamic segments.

Campaign & Workflow

Send a campaign or follow up with event triggers and wait steps.

See every delivery

Inspect delivery, bounce, complaint, and unsubscribe events.

Explore email automation

Automation with control.

From authorization to delivery, know what is happening and who decides what happens next.

Explore permissions & control

Review before sending

Hosted agents prepare drafts. Review the final text before approving a reply.

Grant specific permissions

MCP uses OAuth with separate permissions for reading, drafting, and sending.

Signed events

Webhooks are signed and retried on failure so your receiver can verify the source.

Traceable results

Send requests and delivery outcomes are recorded separately for each recipient.

A few things to know.

How is Mailly different from a send-only API?

Mailly provides two-way inboxes, threads, and agent draft workflows. Send notifications, receive replies, read the conversation, and keep it going. Campaigns, Workflows, and delivery events use the same data.

Do I need my own domain?

Start with an available @mailly.site address. For your own domain, verify ownership and configure the sending DNS records and inbound MX separately.

Can I use my own agent?

Yes. Connect your AI client with MCP or build your own orchestration with the API, CLI, and webhooks. Hosted agents are an option, not a requirement.

Will a hosted agent send replies automatically?

Hosted agents currently draft only; you approve before sending. Your own application can explicitly send through the API or CLI and is responsible for its send controls.

Do I need a subscription?

No. Free includes 3,000 emails and a US$1 allowance every month. Past that, you pay as you go from a prepaid balance: top up from US$5, a one-time payment with no automatic renewal. Extra email is $0.001 each, and hosted-agent AI is billed at the model's official token price. Developer (US$20/month or US$200/year) is an optional plan with more inboxes, custom domains and 30,000 emails a month. See pricing and an example month

Give your next agent an actual inbox.

Start with an address. Connect incoming mail, replies, and follow-ups in one workflow.

Create an account

An inbox for your agents.A workspace for you.