Article View: comp.security.misc
Article #366Re: Fake headers on Internet mail
From: Juergen Nickelsen
Date: Thu, 13 Aug 1992 20:17
Date: Thu, 13 Aug 1992 20:17
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In article <1992Aug13.164814.11389@aio.jsc.nasa.gov> Barrett_Jim@ial3.jsc.nasa.gov (Jim Barrett) writes: > I have observed that some mailer daemons are able to detect certain fraudulent > transcations, and while accepting the "From:" information in the incoming > message, will also include an "Apparently-From:" line in the message header. > Most mailers that I have played with believe the "From:" information fed to > them without a murmur of doubt. If I remember correctly, an "Apparently-From:" or "Apparently-To:" header is only inserted when there is no "From:" respectively "To:" header in the "DATA" part of the mail. SunOS' sendmail (4.1) only inserts an "Apparently-To:" header in this case. -- Juergen Nickelsen
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<NICKEL.92Aug13221704@desaster.cs.tu-berlin.de>Path:
arc1-ca.pugleaf.net!sparky!uunet!mcsun!Germany.EU.net!news.netmbx.de!zrz.tu-berlin.de!mailgzrz.tu-berlin.de!nickelReferences:
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Newsgroups: comp.security.misc Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!Germany.EU.net!news.netmbx.de!zrz.tu-berlin.de!mailgzrz.tu-berlin.de!nickel From: nickel@cs.tu-berlin.de (Juergen Nickelsen) Subject: Re: Fake headers on Internet mail In-Reply-To: Barrett_Jim@ial3.jsc.nasa.gov's message of 13 Aug 1992 16:48:14 GMT Message-ID: <NICKEL.92Aug13221704@desaster.cs.tu-berlin.de> Lines: 18 Sender: news@mailgzrz.tu-berlin.de (News Manager) Nntp-Posting-Host: desaster.cs.tu-berlin.de Reply-To: nickel@cs.tu-berlin.de Organization: STONE Project, Technical University of Berlin, Germany References: <1992Aug12.151404.1424@lub001.lamar.edu> <1992Aug13.164814.11389@aio.jsc.nasa.gov> Date: Thu, 13 Aug 1992 20:17:07 GMT