On Thu, 9 Mar 1995, David Guerrero wrote: > I'm not sure what is it.... could it be a probing for the recent bug of > identd in sendmail, or something like this... No - it's probing for an old bug in Sendmail, which is not to say that similar bugs still exist if you are still running 4.1.1 SunOS. > > 550 | sed '1,/^$/d' | sh... Host unknown Someone is trying to pipe shell commands from the body of the message. > > Received: from i60s14.ira.uka.de by sobrino.eui.upm.es (4.1/3.1) [...] You might want to drop a line to the Postmaster at this site; then again, it could have been forged. -- Dave Horsfall (VK2KFU) | dave@esi.com.au | VK2KFU @ VK2AAB.NSW.AUS.OC | PGP 2.6 Opinions expressed are mine. | E7 FE 97 88 E5 02 3C AE 9C 8C 54 5B 9A D4 A0 CD