On Aug 23, 2018, at 3:01 PM, Shinn Wu <[log in to unmask]> wrote:Hello,We used ListServ 16.0 HPO in Solaris.There are some lists have the setting:ACK=YESUnfortunately, one of the lists was under attack. There were 5,000+ times since two days ago. The spammers used faked email, therefore bounced the acknowledge (confirmation) to the unknown victims.
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