Operating system Ubuntu Linux 22.04.3
Webmin version 2.101 Usermin version 2.001
Virtualmin version 7.8.2 Authentic theme version 21.04
Starting yesterday, I am getting hundreds of Mailer-Daemons and like bounces. This is from a domain where I used to host email, but I have moved the mail for the domain to privateemail.com, and do not have mail service turned on for the domain.
I am getting Daemons like this:
And then a bounce from someone’s server, indicating that the email came from firstname.lastname@example.org
How do I close this hole? I have DMARC, etc. already set up.