# nicemails

> Many mailboxes. One workspace. Create a separate email address for every client, project, or AI agent. Receive verification codes, keep conversations separate, and manage every inbox from one account.

nicemails gives one account many real, independent mailboxes (not aliases) on a shared domain. Each mailbox receives mail on its own address. The same mailboxes are available in the web app, through a REST API and through MCP.

## Who it is for

- For your clients: Give each client a dedicated mailbox for application updates, verification codes, and correspondence. Keep their email separate without switching accounts.
- For your projects: Create a mailbox for each project’s sign-ups and conversations. Find everything in one workspace.
- For your AI agents: Give agents their own mailboxes to receive messages and verification codes. Connect through the API or MCP with permissions you control.

## Use cases

- [Email for AI agents: give each agent its own inbox](https://nicemails.net/use-cases/ai-agent-email): To give an AI agent its own email, create a separate nicemails mailbox for it and connect the agent over MCP. The agent can then read and search that mailbox, pick up verification codes, organize messages and send mail, using only the permissions and mailboxes you grant. A message to a new recipient waits for your approval.
- [A separate email address for every client or project](https://nicemails.net/use-cases/email-per-client): Create one nicemails mailbox for each client or project. Every mailbox is real and independent, not an alias: it has its own address, inbox, folders, sender name and storage. You manage them all from one account, and read new mail from every mailbox together in All inboxes or one mailbox at a time.
- [Receive verification codes and test sign-up emails](https://nicemails.net/use-cases/verification-codes): To receive verification codes for a sign-up or a test, create a nicemails mailbox and enter its address in the form. The code arrives like any other email. Read it in the web app, fetch it with the REST API, or ask an AI agent to find it over MCP. Plus addressing lets one mailbox take many sign-ups.

## Plans and limits

- Free, $0 / month. For trying it out: 3 mailboxes; 3 GB storage; Unlimited receiving; Send to 50 recipients / month; API & MCP: read and manage; send through MCP; Help docs.
- Pro, $10 / month. For clients, projects and AI agents: 100 mailboxes; 10 GB storage; Unlimited receiving; Send to 3,000 recipients / month; API & MCP: read, manage and send; Email support.

| Feature | Free | Pro |
| --- | --- | --- |
| Monthly price (USD) | $0 | $10 |
| Mailboxes | 3 | 100 |
| Receiving | Unlimited | Unlimited |
| Sending | 50 recipients per month | 3,000 recipients per month |
| Total storage | 3 GB | 10 GB |
| API / MCP | Read and manage; send through MCP | Read, manage and send |
| Support | Help docs | Email support |

Receiving is limited only by your storage. Pro renews automatically each month. Prices are in US dollars; applicable taxes are added at checkout.
Each mailbox can store up to 9 GB within the account’s shared storage allowance.

- Each recipient in To, Cc or Bcc counts once. Monthly allowances reset at the start of each UTC month.
- Up to 50 recipients per mailbox and 300 per account per UTC day. The account also has a rolling limit of 100 recipients per hour.
- For the first 14 days after account creation, daily limits are 10 recipients per mailbox and 100 for the account.
- API keys default to 50 recipients per UTC day. A key can have its own daily limit, within the mailbox and account limits.

## Connect an agent

- MCP server (Streamable HTTP): https://nicemails.net/mcp. MCP clients sign in with OAuth in the browser, or send an API key as `Authorization: Bearer <key>`.
- Setup guide: https://nicemails.net/docs. It covers OAuth and API key connections, permissions and every MCP tool.
- REST API base: https://nicemails.net/v1. Documentation: https://nicemails.net/v1/docs. OpenAPI: https://nicemails.net/v1/openapi.json. Authenticate with an API key created in Settings.
- Sending through MCP needs a person's confirmation: before an MCP agent emails a new recipient, the account owner reviews and approves that message in the web app.
- Sending through the REST API requires Pro. Free accounts can send through MCP within the monthly allowance, and can read mail and manage mailboxes through the API.

## Questions

### What can I do on Free?

Receive, read and reply within the Free limits above. The monthly sending allowance covers the web app and MCP agents. Sending with an API key through the REST API requires Pro.

### Why does an agent need approval to send?

Before an MCP agent emails a new recipient, you review the message. Approval covers that message only. Recent recipients you emailed yourself or explicitly trusted can skip this step.

### How do I cancel Pro?

Open the billing portal from Settings. Cancellation takes effect at the end of the paid period, then Free limits apply.

### How long is my mail kept?

Mail stays until you delete it or your account is deleted. Hidden duplicates expire after 7 days and spam after 30 days. See the Privacy Policy for audit records, recovery history and deletion details.

## Pages

- [nicemails · Many mailboxes. One workspace.](https://nicemails.net/)
- [Pricing · nicemails](https://nicemails.net/pricing)
- [Connect an AI agent · nicemails](https://nicemails.net/docs)
- [Email for AI Agents: Give Each Agent an Inbox · nicemails](https://nicemails.net/use-cases/ai-agent-email)
- [A Separate Email Address for Every Client · nicemails](https://nicemails.net/use-cases/email-per-client)
- [Receive Verification Codes in Real Inboxes · nicemails](https://nicemails.net/use-cases/verification-codes)
- [nicemails · Many mailboxes. One workspace. (Chinese)](https://nicemails.net/zh)
- [Pricing · nicemails (Chinese)](https://nicemails.net/zh/pricing)
- [Connect an AI agent · nicemails (Chinese)](https://nicemails.net/zh/docs)
- [Email for AI Agents: Give Each Agent an Inbox · nicemails (Chinese)](https://nicemails.net/zh/use-cases/ai-agent-email)
- [A Separate Email Address for Every Client · nicemails (Chinese)](https://nicemails.net/zh/use-cases/email-per-client)
- [Receive Verification Codes in Real Inboxes · nicemails (Chinese)](https://nicemails.net/zh/use-cases/verification-codes)
- [Terms of Service · nicemails](https://nicemails.net/terms)
- [Privacy Policy · nicemails](https://nicemails.net/privacy)
- [Acceptable Use Policy · nicemails](https://nicemails.net/aup)