system("sudo grep -E 'Passed CLEAN.* ->.*' /var/log/maillog | grep -v root@ > /tmp/PassedCLEAN.txt"); system("sudo awk '{print \$12}' /tmp/PassedCLEAN.txt > /tmp/PassedCLEAN_1.txt"); system('sed -e "s/<\(.*\@.*\)>/\1/g" /tmp/PassedCLEAN_1.txt > /tmp/PassedCLEAN_2.txt');