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Using ServiceNow blackhole or dummy email addresses - Support and Troubleshooting
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  • Using ServiceNow blackhole or dummy email addresses
KB0722504

Using ServiceNow blackhole or dummy email addresses


15040 Views Last updated : Jun 5, 2025 public Copy Permalink English (Original)
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KB Summary by Now Assist

Issue

A blackhole email address is as an email address that immediately discards the emails when they are received. 

This is particularly useful for sub-production instances where you want emails to be sent or processed but do not want them to leave the ServiceNow mail servers.

IMPORTANT: This will ONLY work if your instance is configured to use ServiceNow's mail server for SMTP.

Most of the time, this is configured on SMTP mail servers by specifying certain email addresses or a domain.

 

Resolution

ServiceNow has the following configured on the SMTP mail servers.

# blackhole domains 
example.com discard: 
.example.com discard: 
test.com discard: 
.test.com discard: 
nobody.com discard: 
.nobody.com discard: 
dummy.com discard: 
.dummy.com discard: 
yourcompany.com discard: 
.yourcompany.com discard:

As long as the email address ends with any of the previously mentioned domains, it will be discarded by ServiceNow's SMTP mail server.

For example, nobody@example.com; john.smith@dev.example.com; blackhole@acme.yourcompany.com


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