Re: [Shutup] [ietf-smtp] Proposed Charter for the "SMTP Headers Unhealthy To User Privacy" WG (fwd)
Ted Lemon <mellon@fugue.com> Tue, 01 December 2015 16:52 UTC
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From: Ted Lemon <mellon@fugue.com>
To: shutup@ietf.org
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Date: Tue, 01 Dec 2015 16:51:53 +0000
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Subject: Re: [Shutup] [ietf-smtp] Proposed Charter for the "SMTP Headers Unhealthy To User Privacy" WG (fwd)
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Tuesday, Dec 1, 2015 8:13 AM Paul Smith wrote: > Once that document exists, then no one will add the trace fields, because people are paranoid (often rightly so, but not, I believe, in this case). They won't read the document fully. It may say 'you can remove IP address information from trace headers, but should think long and hard about it because doing so may come back to bite you and leaving the information in has minimal risk unless you're so stupid you haven't bothered with a firewall'. They'll get as far as the first comma, and stop. I had no idea RFCs were so powerful. > To be honest, I'm (pleasantly) surprised IP address information is still put in Received headers nowadays. IMHO, the fact that it is suggests that there's a very good reason for it to stay there. No, it doesn't. It suggests that there are one or more reasons why it has stayed there, zero or more of which may be good reasons. > Many service providers and software publishers 'stretch' the rules somewhat, so if this was a big problem without any down-sides, then IP addresses would have disappeared from Received: headers some years ago. We are seeing providers right now disappearing IP address information for the submission IP source address, so your logic here would suggest that there is in fact a downside to including that information; otherwise it would not have disappeared. > If there were compatibility issues (eg some SMTP servers rejecting mail without the IP address info there), then that would still be a problem even if a new RFC comes out, unless SMTP is totally deprecated and a new mail standard replaces it. There is no such compatibility issue, because there is no required content in Received: header fields (the only thing that's even strongly recommended is "via") . There is advice about what should be in them. People are able to extract data from them anyway, because implementations tend to have default behavior which nobody bothers to change; this behavior tends to follow the examples in e.g. RFC 5821. >If there are no compatibility issues with removing the IP address, then why aren't most providers/systems already removing it nowadays? We've already heard that some Email SPs _are_ removing IP addresses in the most obviously problematic case. The reason they aren't removing IP addresses in more cases is quite likely that they are using stock software (probably Postfix, but could also be MS Exchange or other products) that have default behavior, and they have not been motivated to override the default behavior for cases other than the submit source address case, which has the biggest doxing potential. -- Sent from Whiteout Mail - https://whiteout.io My PGP key: https://keys.whiteout.io/mellon@fugue.com
- Re: [Shutup] Proposed Charter for something Ted Lemon
- [Shutup] Proposed Charter for the "SMTP Headers U… Alexey Melnikov
- Re: [Shutup] Proposed Charter for the "SMTP Heade… John R Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Alexey Melnikov
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Stephen Farrell
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Jim Fenton
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Christian Huitema
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ned Freed
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Rolf E. Sonneveld
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Newman
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Steve Atkins
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Richard Clayton
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ned Freed
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ned Freed
- Re: [Shutup] chained authorizationm, was Proposed… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] chained authorizationm, was Proposed… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Al Iverson
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Steve Atkins
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Randall Gellens
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Martijn Grooten
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ned Freed
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Tony Finch
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Kurt Andersen (b)
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Martijn Grooten
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Christian Huitema
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Stephen Farrell
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Stephen Farrell
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Hector Santos
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Martijn Grooten
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Stephen Farrell
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] real life privacy tradeo… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] real life privacy tradeo… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] real life privacy tradeo… John Levine
- Re: [Shutup] [ietf-smtp] real life privacy tradeo… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Derek J. Balling
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Stephen Farrell
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Derek J. Balling
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Simon Josefsson
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Derek J. Balling
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… John Levine
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Richard Clayton
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Christian Huitema
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Steve Atkins
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Al Iverson
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Kurt Andersen
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Robert A. Rosenberg
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Al Iverson
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] real life privacy tradeo… Derek J. Balling
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… MH Michael Hammer (5304)
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] real life privacy tradeo… Christian Huitema
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Robert A. Rosenberg
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Robert A. Rosenberg
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Dave Crocker
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Chris Lewis
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Ted Lemon
- Re: [Shutup] [ietf-smtp] Proposed Charter for the… Hector Santos
- [Shutup] Proposed Charter for the "SMTP Headers U… SM
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Chris Lewis
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Chris Lewis
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Ned Freed
- Re: [Shutup] Proposed Charter for the "SMTP Heade… SM
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Chris Lewis
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Christian Huitema
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Chris Lewis
- Re: [Shutup] Proposed Charter for the "SMTP Heade… SM
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Martijn Grooten
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Chris Lewis
- Re: [Shutup] Proposed Charter for something John Levine
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Robert A. Rosenberg
- Re: [Shutup] Proposed Charter for something Dave Crocker
- Re: [Shutup] Proposed Charter for something Martijn Grooten
- Re: [Shutup] [ietf-smtp] Proposed Charter for som… John C Klensin
- Re: [Shutup] Proposed Charter for something Stephen Farrell
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Ned Freed
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Stephen Farrell
- Re: [Shutup] Proposed Charter for the "SMTP Heade… Christian Huitema
- Re: [Shutup] [ietf-smtp] Proposed Charter for som… Chris Lewis
- Re: [Shutup] Proposed Charter for something Hector Santos