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Which Bounce Codes Should We Address with a Whitelisting Initiative?

Question asked by Danielle Chan on Aug 27, 2019
Latest reply on Aug 30, 2019 by Sanford Whiteman

We have customers who seem to bounce many times, however, their email addresses look correct. We are looking to email these customers one on one to whitelist our Marketo sending IPs. However, would we do this for all bounces or just certain bounce codes? I'm trying to create a smart list of these people.


Thank you