[cx42net]

Thank you for your reply. From my understanding, what you suggest is that a backscatter uses a return path email that does not exists?

My understanding was that a backscatter uses an email that is not his, in order to deliver a message without sending it directly (and making the bounce server act like a spammer).

Am I missing something?

[willbrowning]

Here is a good blog post [1] that explains backscatter and some ways to help prevent it.

[1] https://willem.com/blog/2019-09-10_fighting-backscatter-spam...

[cx42net]

Thanks!