I think this 'attack' basically this breaks SPF rules. (But M$ borked SPF years ago anyways)
But you can see, those Chinese Script Kiddies are freaking out, they don't know what to do! Oh NOs lol
hopefully your hatches are battened!
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/postfix...
smtpd_forbid_bare_newline=yes
smtpd_data_restrictions=reject_unauth_pipelining
smtpd_discard_ehlo_keywords=chunking
