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What types of bounces cause Marketo to set Email Invalid to True?

Question asked by Denise Greenberg on Nov 11, 2019
Latest reply on Nov 13, 2019 by Sanford Whiteman

Does anyone have a definitive list of the types of bounces that cause Marketo to set Email Invalid to True? I was previously under the impression that any hard bounce with a 500-range (e.g. 5xx) bounce code would trigger Email Invalid. However, I can see instances where this isn't the case. The only documentation in the Product Docs I can find on this is woefully short on detail (Email Invalid - Set to True when a certain type of hard bounce occurs.”).

 

The question occurred to me because a new client has a smart campaign that sets email invalid to true any time a hard bounce has occurred at least twice in 90 days - and the campaign members I spot-checked had all hard-bounced with 5xx bounce reasons the first time.

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