I have set up a working SMTP relay together with MailScanner. This SMTP relay is not — and will not be — able to relay email from the outside, only local email.
Is it possible to send a malicious email with the terminal? I have googled around but could not find anything that could answer my question. For example, I want to use:
echo "{malicious-string}" | mail name@email.com
What could the "{malicious-string}"
be?