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Full Discussion: how to hide the IP in the email header?
Special Forums Cybersecurity how to hide the IP in the email header? Post 7153 by PxT on Wednesday 19th of September 2001 03:40:30 PM
Old 09-19-2001
Quote:
Originally posted by eddie


We buy dial-up accounts just for getting Internet connections.
Exactly. Whether or not you use the ISP's mail server is irrelevant. You are using their dial-up (or broadband) connection, and are therefore bound by their AUP.

Quote:


What reports the IP of my sendmail server to the recipients server? Sendmail daemon? Does the recipients server resolve the IP form the network packets (Network Layer of OSI)?
Yes. At some point the sending machine has to contact a recipient machine to send the message. Whether or not you have inserted your own fake headers at this point is irrelevant. When you make a connection to the recipient the recipient appends the connecting IP to the headers. You can hack your outgoing packets to include a fake source address if you like, but in that case you will have to use SMTP blind -- i.e. sending without ever seeing the responses to your commands.

Quote:

If we have to change something at the network layer to spoof the IP, I would like to give up.
You need access to raw sockets, which generally means root privileges. Unfortunately its not that hard to do. See nmap for example.
 

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LEARN ABOUT SUSE

mailto.conf

mailto.conf(5)							    Apple Inc.							    mailto.conf(5)

NAME

       mailto.conf - configuration file for cups email notifier

DESCRIPTION

       The mailto.conf file defines the local mail server and email notification preferences for CUPS.

       Each line in the file can be a configuration directive, a blank line, or a comment. Comment lines start with the # character.

DIRECTIVES

       Cc cc-address@domain.com
	    Specifies an additional recipient for all email notifications.

       From from-address@domain.com
	    Specifies the sender of email notifications.

       Sendmail sendmail command and options
	    Specifies  the  sendmail  command  to use when sending email notifications. Only one Sendmail or SMTPServer line may be present in the
	    mailto.conf file. If multiple lines are present, only the last one is used.

       SMTPServer servername
	    Specifies a SMTP server to send email notifications to. Only one Sendmail or SMTPServer line may be present in the	mailto.conf  file.
	    If multiple lines are present, only the last one is used.

       Subject subject-prefix
	    Specifies a prefix string for the subject line of an email notification.

SEE ALSO

       classes.conf(5), cupsd(8), cupsd.conf(5), mime.convs(5), mime.types(5), printers.conf(5),
       http://localhost:631/help

COPYRIGHT

       Copyright 2007-2009 by Apple Inc.

12 July 2006							       CUPS							    mailto.conf(5)
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