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Fix SharePoint Rules Not Emailing Shared Mailboxes

Huda Qurayshi Sep 28, 2026 870 views

Question details

SharePoint list or document library rules are successfully sending notifications to personal accounts but failing to deliver emails to a shared mailbox.

How to Fix SharePoint Rules Not Sending Emails to Shared Mailboxes

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Setting up automated SharePoint list or library rules to notify a team via a shared mailbox when items are updated or created.
Observed behavior: The shared mailbox does not receive the notification emails, even though personal accounts do. The missing emails are not in the junk folder, and the notification rule previously worked without issues.

Before you start

Ensure you have site owner or administrator privileges in SharePoint, as you will need to modify site permissions and manage user groups to resolve this email routing issue.

Solution 1Recommended

Grant Read Permissions to the Shared Mailbox

Assigning the shared mailbox to the site's Visitors group provides the necessary Read permissions required for SharePoint to dispatch email notifications.

Recent Microsoft updates require users or mailboxes to have at least Read permission to access the referenced document or list in order to receive alerts. This intentional change is designed to reduce notification noise and ensure only authorized accounts receive document data.

Open Site Permissions

Navigate to your SharePoint site, click on the Settings gear icon in the top right corner, and select 'Site permissions'.

Access Advanced Settings

Click on 'Advanced permissions settings' at the bottom of the panel to manage the underlying SharePoint permission groups.

Add to Visitors Group

Locate and click on the 'Site Visitors' group. Click 'New' then 'Add Users', enter the email address of your shared mailbox, and click 'Share' to grant it Read access.

Grant Read Permissions to the Shared Mailbox

Permissions Syncing: It may take a few minutes for the new permissions to sync across Microsoft 365. Try triggering the rule again after 15-30 minutes.

Solution 2

Verify the Mailbox and Rule Configuration

Ensure the shared mailbox is fully active and the notification rule is properly configured to trigger on the correct events.

Solution 3

Open a Microsoft 365 Support Incident

If permissions are verified and rules are correct but notifications still fail, there may be a backend Exchange or SharePoint routing issue requiring Microsoft's intervention.

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Frequently Asked Questions

Why did my SharePoint rule stop sending emails to the shared mailbox suddenly?

Microsoft periodically updates security and notification policies. A recent update requires the receiving mailbox to have explicitly assigned Read or Edit permissions to the document library to receive alerts. This was implemented to improve notification quality and prevent unauthorized users from receiving document metadata.

Does a shared mailbox need a licensed user account to receive SharePoint alerts?

No, shared mailboxes generally do not require a separate Microsoft 365 license. However, they must be properly created and active in the Exchange admin center, and they must be granted site permissions in SharePoint to receive automated emails.

Will adding the shared mailbox to the Visitors group give it too much access?

No. The Visitors group typically only grants 'Read' access, which allows the mailbox to view items but not modify, delete, or share them. This is the minimum permission required by SharePoint's backend to authorize sending automated email alerts.

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