Email bounce reason is "recipient blackholed"

Issue Description
An email hard bounces with reason "551 5.7.0 [internal] recipient blackholed".  The person is automatically marked as Email Invalid as a result.

 

Issue Resolution
Blackholed addresses are those that Marketo have identified as spam traps, or those that have requested the Marketo Privacy team to block all Marketo originating emails.

 

 


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