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.
Manage Dev Sandboxes (Developer or Developer Pro only)
OR
Manage
Sandboxes (all sandbox types)
To deploy Data 360 objects:
Data Cloud Architect
Enable Blackhole in a full or partial sandbox, and then add exceptions for domains
that need to receive test emails.
Log in to a sandbox org that includes Marketing Cloud Next.
From Setup, in the Quick Find box, enter Blackhole, and then
select Sandbox Blackhole.
Turn on Blackhole.
It takes about 10 minutes for the changes to take effect.
(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 Blackhole doesn’t suppress sends from the Preview and Test window of the email editor
or the Debug Flow window of Flow Builder.
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