Can an AI agent monitor multiple mailboxes?

Most small businesses use at least two email addresses: a generic address like contact@ for incoming requests, and a manager's personal address for everything else. Some add sales@, accounting@, or an old Gmail account that's been around for ten years. When you want an AI agent to monitor these mailboxes to automatically process quote requests or follow-ups, one question always comes up: can you connect everything in the same place?

IWhy want to monitor multiple mailboxes with a single agent?

A plumber receives requests on contact@mycompany.fr, but also on his personal Gmail that old clients know. A consulting firm uses Outlook for the team and Gmail for the founder. A family wants an agent to monitor both parents' accounts to centralize invoices or school notices. In all these cases, the objective is the same: not to miss anything, without opening three tabs every morning.

IIHow does connection to a mailbox work?

When you connect an agent to Gmail or Outlook, you go through a system called OAuth. Concretely, you click a button, Google or Microsoft asks you to identify yourself, then you authorize the agent to read your messages. This authorization is specific to one account: if you have three addresses, you must perform this operation three times, once per address.

IIIOne agent for multiple mailboxes, or one agent per mailbox?

Two approaches exist. The first: a single agent connected to multiple addresses. It reads everything, applies the same rules everywhere. It's simple to manage, but the responses will have the same tone, the same logic. The second: one agent per mailbox, each with its own mission. The quote agent monitors contact@ and commercial@, the administrative agent monitors compta@. This organization requires a bit more thought at the start, but it allows for differentiated behavior.

IVPractical case: a quote agent reading contact@ and commercial@

Let's take a carpenter who receives quote requests on two addresses. He creates an agent with the following mission: read new emails, identify those requesting a quote, extract useful information (type of work, dimensions, desired deadline), and prepare a draft response. The agent is connected to both mailboxes. When an email arrives on one or the other, it processes it the same way.

VPractical case: a family agent monitoring two Gmail accounts

In a family, invoices sometimes arrive on the father's account, sometimes on the mother's. School notices do too. One agent can be connected to both Gmail accounts to centralize this information. Its mission: identify invoices, medical appointment reminders, school emails, and send a weekly summary to both parents. Each parent authorizes access to their own account, the agent does the rest.

VITechnical limits to know

Connecting multiple mailboxes does not pose a major technical problem, but a few points deserve attention. First, each OAuth connection can expire: if you change a password on an account or revoke access, the agent loses the connection to that mailbox. You will need to reconnect it. Next, the token reservoir is common to all your agents: an agent monitoring three very active mailboxes will consume more than an agent on a single quiet address.

VIIMixing Gmail and Outlook in the same agent

Nothing prevents connecting a Gmail address and an Outlook address to the same agent. Both providers use OAuth, the procedure is similar. A restaurant owner can thus monitor their contact@restaurant.fr hosted at Microsoft and their old personal Gmail where certain suppliers continue to write. The agent processes both flows without distinction, according to the mission you have given it.

VIIIWhat if I want different behaviors depending on the address?

If the emails received on contact@ and compta@ have nothing to do with each other, creating two separate agents is often clearer. The quote agent responds to commercial requests with a welcoming tone. The accounting agent handles supplier invoices with rigor and files them. Each has its mission, its reference documents, its style. With ABYS, starting from the 19 euros excl. VAT per month plan, you can have multiple agents working: it's the token pool that limits, not the number of agents.