nanog mailing list archives
Re: Spammers Skirt IP Authentication Attempts
From: Joe Rhett <jrhett () meer net>
Date: Fri, 10 Sep 2004 01:57:51 -0700
Robert Bonomi <bonomi () mail r-bonomi com> wrote
Same thing applies for 'simple' forwarding via sendmails '~/.forward' mechanism. the mail server 'accepts' the mail from the original source, and then 're-sends' to the new destination. That re-send originates as the _forwarding_party_, WITH an 'envelope from' of that forwarding party,
On Fri, Sep 10, 2004 at 09:55:55AM +0200, Stephane Bortzmeyer wrote:
Sorry, this is simply not true (sendmail, postfix, etc, always keep the original envelope from when forwarding).
I'm not sure where "true" diverges from reality in your analysis, but perhaps you should create one of those mail environments and test before you put your foot in your mouth again? -- Joe Rhett Senior Geek Meer.net
Current thread:
- Very peculiar Telnet probing (possibly spoofed?), (continued)
- Very peculiar Telnet probing (possibly spoofed?) Jeff Kell (Sep 08)
- Re: Very peculiar Telnet probing (possibly spoofed?) Suresh Ramasubramanian (Sep 08)
- Re: Very peculiar Telnet probing (possibly spoofed?) Chris Brenton (Sep 09)
- Re: Spammers Skirt IP Authentication Attempts [operational content at end] Rich Kulawiec (Sep 09)
- Re: Spammers Skirt IP Authentication Attempts Edward B. Dreger (Sep 06)
- Re: Spammers Skirt IP Authentication Attempts Paul Jakma (Sep 08)
- Re: Spammers Skirt IP Authentication Attempts Robert Bonomi (Sep 08)
- Re: Spammers Skirt IP Authentication Attempts Robert Bonomi (Sep 08)
- Re: Spammers Skirt IP Authentication Attempts Daniel Reed (Sep 08)
- Re: Spammers Skirt IP Authentication Attempts Stephane Bortzmeyer (Sep 10)
- Re: Spammers Skirt IP Authentication Attempts Joe Rhett (Sep 10)
- Re: Spammers Skirt IP Authentication Attempts Stephane Bortzmeyer (Sep 10)