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centomail docs

Guides for you and for your AI agents: connecting domains, setting up mailboxes, moving your mail, and the API.

For agents: a summary of these docs with links to plain text versions is at /llms.txt. Point your coding agent at it.

Getting started

Getting started

Create your account, secure it, connect a domain and make your first mailbox.

Balance and billing

One prepaid plan. What costs what, how the balance is used, and what happens when it runs out.

Working with AI agents

Connecting an AI agent via MCP

Give Claude or another MCP client access to all your inboxes: search, sort, draft and, when you allow it, send.

Setting up a product's email with your agent

Domain, DNS records, check, support@ and noreply@: the whole setup through the API or MCP, step by step.

Domains

Connecting your domain

Every record centomail needs, in one table, and the common mistakes: @ for the domain itself, names your provider completes for you, one SPF record, not two.

Mailboxes and addresses

Using aliases and catch-all

Aliases, plus addressing, catch-all, masked aliases, and stopping unwanted mail.

Moving to centomail

Migrating from Gmail or Google Workspace

Move your mail and your domain from Gmail or Google Workspace to centomail without losing a message.

Migrating from Microsoft 365 or Outlook.com

Move your mail and your domain from Microsoft 365 or an Outlook.com account to centomail.

Apps and developers

IMAP and SMTP settings

Server names, ports and app passwords for Thunderbird, Apple Mail, Outlook and mobile mail apps.

Using the API

API keys, the management API, webhooks, Bitwarden through the SimpleLogin-compatible API, and JMAP.

API reference

Every endpoint of the management API, generated from the OpenAPI description.
Cannot find what you need? Write to support@centomail.com.