I experienced [^3] as well, but every time I dug into it, it was due to misconfigured mail servers like missing SPF records. Unless somebody has proof for it,

I experienced [^3] as well, but every time I dug into it, it was due to misconfigured mail servers like missing SPF records. Unless somebody has proof for it, I guess attributing it to a poorly explained AI black box instead of malicious intent is more sensible, similar to the "Facebook is listening to conversations and showing ads accordingly".