Backscatter is the incorrectly automated bounce messages sent by mail servers, typically as a side effect of incoming spam.can be used.
- Implement anti-forgery checks - SPF, DKIM and DMARC - Implement recepient checks for acceptance of e-mail - If above not possible disable NDR reports
nc 10.10.10.10 25 EHLO example.com MAIL FROM:[email protected] RCPT TO:[email protected] DATA backscatter testdata .
Create a file with this content (backscatter.txt)
#!/bin/sh while true; do cat backscatter.txt | while read L; do sleep "1"; echo "$L"; done | "nc" -w 3 -C -v "<target-ip>" "25"; done