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How to deleted postfix large queue,If happen spam attack

find the spaming domain and delete

postqueue -p -c /etc/postfix |grep -i | cut -d ' ' -f 1 > /tmp/cleanoutqueue.sh

cat /tmp/cleanoutqueue.sh |awk '{print "sudo postsuper -c /etc/postfix/ -d " $1}'> /tmp/cleanoutgo1.sh

chmod +x /tmp/cleanoutgo1.sh

sh /tmp/cleanoutgo1.sh

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