Mailbridge
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Why Mailbridge exists

No connector could reach all my inboxes. So I built one.

A typical mail connector
One tenant per connection
Mailbridge
One endpoint, every mailbox
A typical mail connector reaches one Microsoft 365 tenant. Mailbridge gives your AI agent one endpoint that reaches every tenant, plus Outlook.com and IMAP mailboxes.

My email is spread across several Microsoft 365 tenants, and I wanted my AI agents to work with all of it: every inbox, whichever tenant it lived in.

The Microsoft 365 connectors couldn't do that, and neither could the other mail connectors I looked at. Each one worked with a single Microsoft tenant, so my AI only ever saw part of my mail.

I asked Claude for a way round it. Its answer was simple: I'd already written other MCP servers, so I should write this one myself.

Mailbridge is the result. Connect your mailboxes from any Microsoft 365 tenant, Outlook.com, Hotmail or IMAP, and your AI agents reach all of them through one private MCP endpoint. Each mailbox keeps its own boundary: reading by default, writing only when you allow it, and everything your AI does recorded in your activity log.

I built it for my own inboxes first. Now it's open to anyone with the same problem.

Ian
Built Mailbridge
Connect your mailboxes