I'm getting a flood of bounce email notifications stating things like "the address has not been found" and "the delivery has not been completed." I've never sent any of these emails, and I can't figure out what's going on. It's really overwhelming, as the number of bounce emails seems infinite. I've already changed my password, limited my access to one device, and ensured that two-step verification is active. However, the bounce messages keep coming. I found some info on Google's support page about spam but it didn't really offer any solutions to my problem.
3 Answers
It sounds like someone might be spoofing your email address to send out spam. Unfortunately, there's not much you can do to stop it from happening directly, but you can take precautions to secure your account further.
Make sure your email provider has bounce verification and an outbound DMARC setup in place. This helps to protect against unauthorized use of your address.
How do I even go about doing that? I'd really appreciate some guidance!
You might have a virus or some application that's hijacking your email. Definitely change your passwords again! Also, check your 'sent' folder for anything suspicious that you might have missed before.
I checked my sent items already, and there’s nothing weird there. It’s so frustrating!

Does Gmail have those features? I'm not sure how to set them up, could you point me in the right direction?