---
schema_version: "1"
id: 572bdc99d90d6940c599b35c900eb15149e80a8b1ef8724650e69b1a48261785
title: Set Up a Sandbox Blackhole for Email
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mktg_admin_setup_sandbox_email_black_hole.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mktg_admin_setup_sandbox_email_black_hole.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: f53cd76711048dfc33f2bdf0a7d60608d6d727593d95ba4055881818da983a4f
description: When you test email in a sandbox, a blackhole prevents the accidental sending of test messages to real customer email addresses. Use a blackhole to test high-volume email sends, flow executions, or complex, multichannel campaign builds without consuming message credits.
products:
  - Marketing
release: "264"
---
# Set Up a Sandbox Blackhole for Email

When you test email in a sandbox, a blackhole prevents the accidental sending of test messages to real customer email addresses. Use a blackhole to test high-volume email sends, flow executions, or complex, multichannel campaign builds without consuming message credits.

### Required Editions

[View supported editions](https://help.salesforce.com/s/articleView?id=mktg.mktg_editions.htm&release=264.0.0&type=5 "Marketing Cloud Next is available in Growth and Advanced editions, and requires Salesforce Enterprise or Unlimited editions. Some features are limited by edition or purchased add-on. All functionality is available in Lightning Experience only.").

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small permission">
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            <th scope="colgroup" class="slds-cell-wrap" colspan="2" style="text-align:center;vertical-align:top;" id="d15585e47">User Permissions Needed</th>
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            <td data-label="User Permissions Needed" class="slds-cell-wrap" style="vertical-align:top;" headers="d15585e47 ">To create a sandbox:</td>

            <td class="slds-cell-wrap" style="vertical-align:top;" headers="d15585e47 ">
              <p>Manage Dev Sandboxes (Developer or Developer Pro only)</p>
              <p>OR</p>
              <p style="margin-bottom:0;">Manage
                Sandboxes (all sandbox types)</p>
            </td>

          </tr>
          <tr class="">
            <td data-label="User Permissions Needed" class="slds-cell-wrap" style="vertical-align:top;" headers="d15585e47 ">To deploy <span>Data 360</span> objects:</td>

            <td class="slds-cell-wrap" style="vertical-align:top;" headers="d15585e47 "><span>Data Cloud Architect</span></td>

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        </tbody>
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Enable Blackhole in a full or partial sandbox, and then add exceptions for domains that need to receive test emails.

1. Log in to a sandbox org that includes Marketing Cloud Next.
2. From Setup, in the Quick Find box, enter Blackhole, and then select **Sandbox Blackhole**.
3. Turn on Blackhole.
    
    It takes about 10 minutes for the changes to take effect.
4. (Optional) In the Add Allowed Email Domains section, add up to five email domains that can receive test emails. For example, if you add example.org, a sandbox email sent to any address with the example.org domain can reach the recipient.

![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-mktg_all-264-0-0-production-enus/e92be4e1-4bef-47a5-a11d-95f4ea1f7d7a/images/icon_note.png)

Note Blackhole doesn’t suppress sends from the Preview and Test window of the email editor or the Debug Flow window of Flow Builder.