On occasion, you will see bounces recorded in the Data View: Bounce that you do not see when viewing Email Tracking in Email Studio. This can also be seen when viewing the Bounces in Tracking and then exporting the Bounce report and noticing a difference in the counts. These are related to False Bounces.
A false bounce is normally recorded when the recipients' email server sends a bounce response but then sends a delivery response for the email.
This can also happen when an email shows a bounced response but then there is an open or click recorded for that email. This could be from a CC or BCC recipient opening the email or clicking links.
Once a Bounce Response is resolved and the email is delivered it is removed from the Tracking Tab in Email Studio but will remain in the Data View: Bounce
See also:
Bounce categories and reasons for Marketing Cloud email sends
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