Because a site the machines have found is locked out dozens of times a day, and forty emails in an afternoon teaches you to ignore the forty-first — and then the one that matters. One a day is the version somebody actually reads. It names the address the attempt came from and, while Record every attempt is on, how many attempts were refused in the last day. With it off there is nothing written down to count, and the email says so instead of giving a number.
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