Do you know it is possible to send email just by forging send emails with different from and to addresses?
such as sendmail -v [EMAIL PROTECTED] <<EOF X-Apparently-To: [EMAIL PROTECTED] via -40.-120.-81.62; 15 Aug 2002 18:48:33 -0700 (PDT) Return-Path: <[EMAIL PROTECTED]> Received: from 216.136.171.252 (EHLO usw-sf-list2.sourceforge.net) (216.136.171.252) by mta426.mail.yahoo.com with SMTP; 15 Aug 2002 18:48:32 -0700 (PDT) Received: from usw-sf-list1-b.sourceforge.net ([10.3.1.13] helo=usw-sf-list1.sourceforge.net) by usw-sf-list2.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 17fWCd-0007gk-00; Thu, 15 Aug 2002 18:47:03 -0700 Received: from 202-77-223-48.outblaze.com ([202.77.223.48] helo=frodo.hserus.net) by usw-sf-list1.sourceforge.net with esmtp (Cipher TLSv1:DES-CBC3-SHA:168) (Exim 3.31-VA-mm2 #1 (Debian)) id 17fWCR-0004x9-00 for <[EMAIL PROTECTED]>; Thu, 15 Aug 2002 18:46:51 -0700 Received: from 202-77-223-2.outblaze.com ([202.77.223.2] helo=mjollnir.outblaze.com) by frodo.hserus.net with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 4.10) id 17fWCP-0006T0-00 for [EMAIL PROTECTED]; Fri, 16 Aug 2002 09:46:49 +0800 Received: from suresh by mjollnir.outblaze.com with local (Exim 4.10) id 17fWCR-000A3P-00 for [EMAIL PROTECTED]; Fri, 16 Aug 2002 09:46:51 +0800 From: "Forged" [EMAIL PROTECTED] To: "me me me..." [EMAIL PROTECTED] Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.1i Subject: [LIH]Re: sendmail -Spam Precedence: bulk Test EOF Sorry if that mail domain exists it is not my fault. this is your email modified to show it as an example. My point is forging is the one done by most spammers. ----- Original Message ----- From: "Suresh Ramasubramanian" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, August 15, 2002 9:46 PM Subject: [LIH]Re: sendmail -Spam > +++ Manu [linux-india] <15/08/02 16:14 -0000>: > > we have a mailserver with sendmail... > > how do we stop spam... > > becos i find junk mail coming from some address and going to som > > address.. > > Looks like you have an open relay. Or maybe someone broke into your server > and is using it to relay spam. Or you have an open proxy. Or someone has > compromised an insecure script like formmail.pl on your system. > > Post some logs, please ... > > -srs > > -- > Suresh Ramasubramanian <----> mallet <at> efn dot org > EMail Sturmbannfuhrer, Lower Middle Class Unix Sysadmin > [Linux One Stanza Tip] From : <[EMAIL PROTECTED]> > LOST #214 -**< Sub : Ultimate Packer for eXecutables (upx) >**- > Making a floppy distro, or wanting to save space on a laptop ? > Use 'upx' to compact all i386 executables (not scripts). Note: > Avoid upx-ing binaries used by init process though ... visit > URL http://upx.sourceforge.net/ > > > ------------------------------------------------------- > This sf.net email is sponsored by: OSDN - Tired of that same old > cell phone? Get a new here for FREE! > https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 > _______________________________________________ > linux-india-help mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/linux-india-help > ------------------------------------------------------- This sf.net email is sponsored by: OSDN - Tired of that same old cell phone? Get a new here for FREE! https://www.inphonic.com/r.asp?r=sourceforge1&refcode1=vs3390 _______________________________________________ linux-india-help mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/linux-india-help
