I'm sorry to hear that you had experienced a higher than normal bounce rate for your campaign. I understand how this can be a bit concerning. We would like to look into this further but we do want to keep your account information private. I will be sending you an email with more details about about this specific campaign and what my findings are.
In the meantime I have located a helpful article that goes into detail about understanding bounces.
Click here to view the FAQ.
Thank you for reaching out to us about this! Please feel free to contact us again if anything else comes up.