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Special Forums Cybersecurity how to hide the IP in the email header? Post 5425 by Neo on Tuesday 14th of August 2001 05:57:41 PM
Old 08-14-2001
Yes, you can monkey with sendmail.cf and have lots of fun. However, there are a lot more header information than the ones you posted, so you have to dig deeper into the headers and how the headers are generated. The sendmail book by OReilly is good for this.


As far a the intent of the SMTP protocol, I don't think there is a documented book on the thoughts of the late Jon Postel why he created the protocol as he did. I don't think that when SMTP was invented, Jon or anyone in their wildest dreams, conceived of how email is vastly used today. Spam, privacy, security, all of the topics were not even in the back-of-the-mind when SMTP the IETF RFC was created. Back then, folks were just trying to send messages between diverse organizations and even the use of the @ system was NOT standard.

So, I think it is a leap of the imagination to discuss what was in the mind of Jon Postel and SMTP mail in 1980s; with the exception of trying to get clumsy and clunky email to work with IMP processors created by BBN Smilie

Suggest folks interested read "Where Wizards Stay Up Late" where this is discussed (the origins of the Internet); and the first (or one of the first) email messages, sent my Professor Kleinrock, to seek his lost razor after a trip.


This book is a must read for all interested in the real origins of the Internet (and not the modern hype).
 

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XDG-EMAIL(1)															      XDG-EMAIL(1)

NAME
xdg-email - command line tool for sending mail using the user's preferred e-mail composer SYNOPSIS
xdg-email [--utf8] [--cc address] [--bcc address] [--subject text] [--body text] [--attach file] [mailto-uri address(es)] xdg-email {--help --manual --version} DESCRIPTION
xdg-email opens the user's preferred e-mail composer in order to send a mail to address(es) or mailto-uri. RFC2368 defines mailto: URIs. xdg-email limits support to, cc, subject and body fields in mailto-uri, all other fields are silently ignored. address(es) must follow the syntax of RFC822. Multiple addresses may be provided as separate arguments. All information provided on the command line is used to prefill corresponding fields in the user's e-mail composer. The user will have the opportunity to change any of this information before actually sending the e-mail. xdg-email is for use inside a desktop session only. It is not recommended to use xdg-email as root. See http://portland.freedesktop.org/EmailConfig for information on how the user can change the e-mail composer that is used. OPTIONS
--utf8 Indicates that all command line options that follow are in utf8. Without this option, command line options are expected to be encoded according to locale. If the locale already specifies utf8 this option has no effect. This option does not affect mailto URIs that are passed on the command line. --cc address Specify a recipient to be copied on the e-mail. --bcc address Specify a recipient to be blindly copied on the e-mail. --subject text Specify a subject for the e-mail. --body text Specify a body for the e-mail. Since the user will be able to make changes before actually sending the e-mail, this can be used to provide the user with a template for the e-mail. text may contain linebreaks. --attach file Specify an attachment for the e-mail. file must point to an existing file. Some e-mail applications require the file to remain present after xdg-email returns. --help Show command synopsis. --manual Show this manualpage. --version Show the xdg-utils version information. ENVIRONMENT VARIABLES
xdg-email honours the following environment variables: XDG_UTILS_DEBUG_LEVEL Setting this environment variable to a non-zero numerical value makes xdg-email do more verbose reporting on stderr. Setting a higher value increases the verbosity. EXIT CODES
An exit code of 0 indicates success while a non-zero exit code indicates failure. The following failure codes can be returned: 1 Error in command line syntax. 2 One of the files passed on the command line did not exist. 3 A required tool could not be found. 4 The action failed. 5 No permission to read one of the files passed on the command line. CONFIGURATION
Visit http://portland.freedesktop.org/EmailConfig for information how to configure xdg-email to use the email client of your choice. EXAMPLES
xdg-email 'Jeremy White <jwhite@example.com>' xdg-email --attach /tmp/logo.png --subject 'Logo contest' --body 'Attached you find the logo for the contest.' 'jwhite@example.com' xdg-email --subject 'Your password is about to expire' 'jwhite@example.com' 'bastian@example.com' 'whipple@example.com' AUTHOR
Kevin Krammer, Jeremy White. <kevin.krammer@gmx.at> <jwhite@codeweavers.com> xdg-utils 1.0 06/24/2007 XDG-EMAIL(1)
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