recruiting campaign emails are bouncing

Summary:

Hello,

we're testing the recruiting campaigns feature. We have set up an email campaign and scheduled the processes. The audience is not receiving the notification and the metrics show that the emails have bounced.

What does that mean and how can we fix it?

Kind regards

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Version (include the version you are using, if applicable):

25C

Code Snippet (add any code snippets that support your topic, if applicable):