Sorry, but I don't think so. The consequence is not limited to "them", as I see it. Any "inside" user receiving NATed e-mail could look at the mail headers and conclude that my IP address is that of the originating server and use it to send me e-mail. And my address *is* routable.
Once again, the purpose and intent of RFC 1918 is to regulate the range of private IP addresses behind a firewall/router. Going back to the original poster (Mahmut Esenler), his NATed internal IP was said to be 192.168.1.63 which is within the private ranges defined by RFC 1918. My answer as to why he would want to hide it from the headers -- a point that you also addressed -- mentioned that no one could trace 192.168.1.63 to any server, by definition. Guy -- Guy Isabel <[EMAIL PROTECTED]> ----- Original Message ----- From: "Rod Dorman" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, June 13, 2003 18:06 Subject: Re: [IMail Forum] OT: IP address appears in header with sender info > On Friday, June 13, 2003, 17:21:23, Guy Isabel wrote: > >>>> non-routable one (192.168.1.63) > >> not everybody runs RFC1918 inside. > > I hate to say this but they *sould* (as you well know). Breaking the RFCs is > > a good way to attract possible problems. Are you implying that RFC ignorance > > is somehow expected from mail admins who choose to use, for instance, > > 66.130.24.110 (my current IP) as a private, internal IP address? Are they > > assumed to pick *any* dotted-quad address as they please and not be blamed > > for consequences? > > The only real consequence is to them. They won't be able to reach your > IP since it will be considered internal. > > -- > [EMAIL PROTECTED] "The avalanche has already started, it is too > Rod Dorman late for the pebbles to vote." - Ambassador Kosh To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
