No mention of what happened the last time we mixed and matched line endings? https://smtpsmuggling.com/
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If every server updated to line-end of LF, thereby supporting both types, this vuln wouldn’t happen?
Of course if there’s is a mixed bag then I guess this is still possible, if your server only supports CRLF. At least in that scenario you have some control over the issue though.
Unfortunately, asking more people to ignore the currently estabilished standards makes the problem worse, not better.