Overview

Welcome to the Astreo documentation. Learn how to set up Astreo, use it as a team and integrate it via the APIs.

What is Astreo?

Astreo is a web-based email client for teams. Several people jointly run mailboxes like info@, support@ or sales@ - with clear ownership instead of CC chaos: conversations get assigned, discussed internally and answered together.

Important: Astreo is a client, not an email provider. Your mailboxes stay where they are (Microsoft 365/Outlook or any IMAP mailbox) - Astreo simply connects them and lays the team workflow on top. There is nothing to migrate, and your address doesn't change.

With Astreo Clear, Astreo takes the sorting off the team's hands: an AI reads the inbox, turns emails into cases, spots deadlines and commitments, suggests who takes care of them and prepares replies with evidence. The Today page shows which of them need a decision. Nothing is decided or sent without a person. More under Clear at a glance.

Key concepts

• Mailbox (account): a connected email address (e.g. support@company.com). You can connect as many as you like.
• Thread (conversation): a related exchange of several messages - the unit you work with day to day.
• Assignment: a thread gets an owner. "Assigned to me" shows each person exactly their tasks.
• Case: a thread with a state (open, waiting, completed) and an owner – with Astreo Clear also with a deadline, a counterpart and a prepared draft.
• Internal chat: a message right on the thread that only the team sees - never the sender.
• Tag: a label to structure threads, personal or for the whole team.

Who is Astreo for?

For small and medium teams that jointly run central addresses - support, sales, office, accounting. Astreo runs GDPR-compliant in the EU, encrypts credentials at rest and connects your existing mailboxes. Individual users equally benefit from multi-account, filters, templates and AI assistance.

How this documentation is organised

• Getting started: Getting started and Company, access & billing – signing up, inviting colleagues, seats and plan.
• How-tos: step by step from the team inbox through templates, junk list and distribution lists to AI and approving Astreo in Microsoft 365.
• Mailbox & everyday: connecting mailboxes, reading and writing mail, signatures and templates, encryption.
• Astreo Clear: at a glance, Today and the four stacks, deciding a case, commitments, ownership and cover, rules and traceability.
• Collaboration: Team inbox with roles and permissions, cases and views, kanban and swimlanes, tasks, reporting, escalation and morning mail, tags.
• Automation & AI: filters, spam protection, AI-assisted drafts.
• More: calendar and contacts, settings and security with log and seal.
• Developers: REST API, webhooks and MCP server for integrations and AI agents.

New here? Start with Getting started.