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On the recordRead 11 Oct 202623 facts
MailKite Server
Sheridan, Wyoming, USA
Plans and prices
MailKite Server (AGPL-3.0)
Free
Open-source server; runs on Node.js ≥ 22.5; self-hosted
Read 11 Oct 2026 · mailkite.dev
On the record
- API
- The self-hosted API supports JSON send and receive through /v1/send, /v1/send/batch, /v1/me, and /api/messages.mailkite.dev · read 11 Oct 2026
- API limits
- The maker says templates, scheduling, attachments, tracking, and other hosted-only features are not yet part of the self-hosted API surface.mailkite.dev · read 11 Oct 2026
- Backend
- The reference backend is one Node process using node:sqlite with zero npm dependencies.mailkite.dev · read 11 Oct 2026
- Company
- MailKite is a business name of SendHub LLC, whose listed address is 30 N Gould St #59709, Sheridan, Wyoming 82801, USA.mailkite.dev · read 11 Oct 2026
- Components
- The stack includes Haraka SMTP MX and submission edges, an IMAP server, a SQLite reference backend, and a web console.mailkite.dev · read 11 Oct 2026
- Deployment
- The project says it runs on Node.js 22.5 or later and documents Docker Compose, VPS, Fly.io, and Railway deployments.mailkite.dev · read 11 Oct 2026
- IMAP
- The IMAP4 server uses implicit TLS on port 993 and is described as read-mostly INBOX and Sent.mailkite.dev · read 11 Oct 2026
- IMAP limitations
- The maker describes its IMAP support as read-mostly INBOX and Sent, without full IMAP or JMAP features such as folders, server-side rules, and ManageSieve.mailkite.dev · read 11 Oct 2026
- Inbound delivery
- Inbound messages can be delivered to the backend as signed webhooks with retries, or accessed through REST or IMAP.mailkite.dev · read 11 Oct 2026
- Inbound mail
- The MX edge checks recipients and sends raw messages to the backend as signed webhooks.mailkite.dev · read 11 Oct 2026
- Integrations
- MailKite lists official SDKs for Node.js, Python, Ruby, Go, PHP, Java, C#, and Rust, plus a CLI, an MCP server, and SMTP relay integrations.mailkite.dev · read 11 Oct 2026
- Intended use
- The project is aimed at getting email into application code; its page says it is not intended as a full human mailbox service with webmail, calendars, and quotas.mailkite.dev · read 11 Oct 2026
- License
- The server components are licensed under AGPL-3.0.mailkite.dev · read 11 Oct 2026
- Maker
- The site identifies SendHub LLC, doing business as MailKite, and gives its address as 30 N Gould St #59709, Sheridan, WY 82801, USA.mailkite.dev · read 11 Oct 2026
- Notable limits
- The self-hosted API does not yet claim full Cloud API parity; templates, scheduling, attachments, and tracking are listed as hosted-only features.mailkite.dev · read 11 Oct 2026
- Outbound mail
- The submission edge supports SMTP AUTH on ports 587 and 465 and signs mail with DKIM.mailkite.dev · read 11 Oct 2026
- Purpose
- MailKite Server is an open-source email server for apps and AI agents.mailkite.dev · read 11 Oct 2026
- SDKs
- The official Node or TypeScript client can target a self-hosted server by setting its base URL.mailkite.dev · read 11 Oct 2026
