On Mon 21/Apr/2025 19:29:10 +0200 Allen Robinson wrote:
I agree that a large number of recipients is not a requirement for replay attacks. Abusers that target many mailboxes tend to get more attention than those that target small numbers (or one) due to their ability to negatively impact a sender's ability to send mail, and so that's the style of attack that gets discussed the most when talking about mitigation or prevention strategies.
While a large number of recipients is not a requirement, a spear-phishing message addressed to a single recipient can more easily be sent directly to that recipient. Unless the spammer needs to hide all traces of contact with the victim, that is.
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