Connectors / Microsoft 365
Email
Microsoft 365
Send email from a shared mailbox in your company's Microsoft 365. Customers get it from your own address, not ours.
Included on every plan. An admin approves it once.
What your app can do with it
- ✓Send email from one shared mailbox, like orders@ or support@
- ✓Mail comes from your own domain, so it lands in the inbox, not in spam
- ✓It stays yours: move the app elsewhere and the email keeps working
For your IT admin
Setting it up
Done once, in your company's own account with Microsoft.
1
Create an app registration in the customer’s Entra tenant.
2
Grant it the Mail.Send application permission and admin consent, nothing wider.
3
Add an ApplicationAccessPolicy so it can send only as the one shared mailbox, never as anyone else in the tenant.
4
Generate a client secret and hand it to the platform once. It is never shown again.
For developers
What your app receives
Sends mail through Microsoft Graph using an app registration in the customer’s own Entra tenant, so the sending domain, its reputation and the mailbox all stay with them. Your application receives four variables at deploy time and calls Graph directly: two HTTPS requests, no dependency, in any language. Because the registration is theirs, leaving the platform costs nothing, since the same variables set anywhere else keep the mail flowing.
Microsoft 365's own documentation →GRAPH_TENANT_IDGRAPH_CLIENT_IDGRAPH_CLIENT_SECRETMAIL_FROMOther ways to send email
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