Hello @AlexL277 ,
It's most likely that their domain or ISP checked through the links prior to delivery - which would have resulted in erroneous clicks, especially since they all occurred within the same minute of delivery and bounce reporting. With that said, you may wish to reach out to the contact directly to see if their domain/ISP improperly reported them as non-existent to our system. However it's more likely that they are a legitimate bounce and should be removed, along with most of the others our system recommends for removal.
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