Self-hosted IMAP,
or managed OAuth too.
"IMAP MCP server" is the catch-all for self-hosted connectors that speak IMAP/SMTP — anything from Gmail to ProtonMail Bridge to your own mail server. The OSS field (codefuturist/email-mcp, nikolausm, ai-zerolab, yunfeizhu) is pragmatic when you want one MCP for any inbox. CME covers the same IMAP surface AND adds managed OAuth for Gmail / M365 — no two integrations.
IMAP + OAuth, hosted.
App passwords for self-hosted mail; OAuth PKCE for Gmail and Microsoft 365 — same endpoint, same 195 tools.
OSS, self-hosted, IMAP-only.
MIT-licensed Node/Python servers. codefuturist/email-mcp leads on features (47 tools, IMAP IDLE, multi-provider auto-detect).
Which one is right for you?
- ›You're on Gmail or Microsoft 365 and don't want to build OAuth flows yourself.
- ›You want IMAP support PLUS modern OAuth in one connector.
- ›You want depth: sender detection, newsletter detection, bulk unsubscribe, follow-ups, sweep 500K, audit log.
- ›Your inbox is on a self-hosted or niche provider (mox, ProtonMail Bridge, corporate Exchange).
- ›You're fine with app passwords / basic auth and trust your own secret handling.
- ›You want to read the source, audit it, fork it, run it locally.
- ›Mixed estate: some IMAP-only mailboxes, some OAuth-managed.
- ›Prototype with OSS locally and graduate to CME for production reliability.
17 rows. Every cell sourced.
Connection model
Auth and hosting.Tool surface
Coverage and depth.Operational
Maintenance and ops.Pricing
License vs total cost.Side by side.
OSS IMAP servers are MIT-licensed and free. Real cost is hosting plus engineer-hours wiring OAuth, rotating app passwords, monitoring IDLE connections.
- Free1 inbox, 5K cleanup actions/mo$0
- Pro3 inboxes, 25K cleanup actions/mo$9/mo
- Power10 inboxes, 100K cleanup actions/mo$25/mo
- OSS licenseMIT — codefuturist, nikolausm, ai-zerolab$0
- HostingVPS, secrets store, monitoringYour infra
- Ops timeOAuth client, IMAP creds, patchingEngineer hours
OSS is great for tinkerers and self-hosted mailboxes. CME is for people who want IMAP + OAuth providers + email depth in one managed endpoint.
Plug your real inbox in.
Free tier ships read-only access. No credit card. Connect Gmail, Outlook, iCloud, or any IMAP account in under a minute.