Custom domains on Google Workspace or Microsoft 365

How does Inbox Triage tell where my domain's mail lives?

A custom domain, like you@yourcompany.com, can be hosted anywhere. We look up where the domain's mail is delivered. If it goes to Google, we use Google sign-in. If it goes to Microsoft, we use Microsoft sign-in. Otherwise we treat it as IMAP. We never assume an unknown domain is Google.

How do I choose the service myself?

1. On Inboxes, enter the label and address.
2. Set Mail service to Google (Gmail / Workspace) or Microsoft (Outlook.com / Microsoft 365).
3. Choose Add inbox. Google's or Microsoft's sign-in opens.

If you are not sure where your domain's mail lives, ask whoever set up your email, or check the admin page where you manage your domain.

Why does it matter?

Google and Microsoft sign-in need no password on our form, and a Workspace inbox connected through Google gets Gmail labels. Connecting a Workspace domain over IMAP can also fail if your admin has turned IMAP off.

What about other hosts?

• iCloud+ custom domain: choose Other (IMAP) with server imap.mail.me.com, your icloud.com address as the Username, and an app-specific password. See Connect iCloud Mail.
• Exchange servers your company runs itself are not supported. If the server offers IMAP, connect over IMAP.

What should I tell my AI?

If your AI adds the inbox for you, tell it where the domain is hosted: "my work address is on Microsoft 365." It can then pick the right sign-in instead of the default.