nanog mailing list archives
Re: ICANN opens up Pandora's Box of new TLDs
From: Rich Kulawiec <rsk () gsp org>
Date: Sat, 28 Jun 2008 17:34:33 -0400
On Sat, Jun 28, 2008 at 01:12:39PM -0700, Matthew Petach wrote:
Those two statements of yours directly contraindicate each other.
No, they don't. Outbound relays (which are presumably used by client systems presenting appropriate authentication) know the identity of user presenting credentials. They can thus return a NDN (or similar) to that user, i.e., there's no concern about outscatter. But worth noting is that this works *because* the mail is being submitted with user authentication -- it won't work for a relay that doesn't do that. That's a very different situation from case where the same outbound relay is talking to a random mail server elsewhere on the 'net. Attempts by such random mail servers to "return" bounces to their origin (from when they never came) are outscatter, which is why rejects are much preferred. (Yes, I'm aware of various mail authentication proposals. Whatever they are/aren't, they're not the right solution to this specific problem: the solution is to always reject, never bounce.) ---Rsk
Current thread:
- Re: Mail Server best practices - was: Pandora's Box of new TLDs, (continued)
- Re: Mail Server best practices - was: Pandora's Box of new TLDs John Peach (Jun 29)
- Re: Mail Server best practices - was: Pandora's Box of new TLDs Stephane Bortzmeyer (Jun 29)
- RE: Mail Server best practices - was: Pandora's Box of new TLDs Frank Bulk - iNAME (Jun 29)
- Re: Mail Server best practices - was: Pandora's Box of new TLDs 'Stephane Bortzmeyer' (Jun 29)
- Re: Mail Server best practices - was: Pandora's Box of new TLDs Roland Perry (Jun 30)
- Re: Mail Server best practices - was: Pandora's Box of new TLDs Laurence F. Sheldon, Jr. (Jun 29)
- Re: Mail Server best practices - was: Pandora's Box of new TLDs Rich Kulawiec (Jun 29)
- Re: ICANN opens up Pandora's Box of new TLDs Jim Shankland (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs Rich Kulawiec (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs Matthew Petach (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs Rich Kulawiec (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs Marshall Eubanks (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs Tony Finch (Jun 27)
- Re: ICANN opens up Pandora's Box of new TLDs Raoul Bhatia [IPAX] (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs David Conrad (Jun 28)
- Re: ICANN opens up Pandora's Box of new TLDs Stephane Bortzmeyer (Jun 29)
- Re: ICANN opens up Pandora's Box of new TLDs Marshall Eubanks (Jun 29)
- Re: ICANN opens up Pandora's Box of new TLDs Tuc at T-B-O-H.NET (Jun 29)
- Re: ICANN opens up Pandora's Box of new TLDs Gadi Evron (Jun 29)
- Re: ICANN opens up Pandora's Box of new TLDs Florian Weimer (Jun 29)