Re: [dane] email canonicalization for SMIMEA owner names
Viktor Dukhovni <ietf-dane@dukhovni.org> Fri, 12 December 2014 00:31 UTC
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Date: Fri, 12 Dec 2014 00:31:31 +0000
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
To: dane@ietf.org
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Subject: Re: [dane] email canonicalization for SMIMEA owner names
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On Fri, Dec 12, 2014 at 11:09:53AM +1100, Mark Andrews wrote: > We could just do this correctly and use SRV records to point to > keyserver servers running over TLS. The keyserver can do whatever > local canonicalisations that are required. The SMTP server could > even be performing this role on a different port. That way you > only have to enter the canonicalisation rules once. > > This also gets rid of the complaints about being able to walk the > zone. Since this is the DANE working group, those would be DANE TLSA authenticated servers, designated via a suitable SRV record. The presence of the SRV record itself would signal adoption of the protocol by the domain. However, this makes the protocol much more complex. Mail clients that just do local submission and did not need a TLS stack, would now need to implement HTTPS, and we'd end-up defining a rather complex protocol layered over that. DNS does scale better. If we're really going to do this as a direct query to the remote domain (and not a DNSSEC lookup), perhaps the right application protocol is some sort of minimal SMTP over SSL on a port indicated by the SRV record: <tcp connect> C/S: <TLS handshake> C: SMIMEA "Frank.Jr."@example.com S: 250-3 1 1 <blob1> S: 250 3 1 2 <blob2> <TCP disconnect> HTTP seems like much too much baggage, and the above could actually be an additional service operated as part of the MTA, (the email administrator would not need to be either a DNS administrator or a webmaster). The SMTP server would know how/whether to case-fold the address. -- Viktor.
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- [dane] email canonicalization for SMIMEA owner na… Rose, Scott W.
- Re: [dane] email canonicalization for SMIMEA owne… Ian Fette (イアンフェッティ)
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… Christian Rößner
- Re: [dane] email canonicalization for SMIMEA owne… John Levine
- Re: [dane] email canonicalization for SMIMEA owne… John Levine
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… Mark Andrews
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… Mark Andrews
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… Mark Andrews
- Re: [dane] email canonicalization for SMIMEA owne… Ian Fette (イアンフェッティ)
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… Paul Wouters
- Re: [dane] email canonicalization for SMIMEA owne… Paul Wouters
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… John Levine
- Re: [dane] email canonicalization for SMIMEA owne… Mark Andrews
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… Ben Laurie
- Re: [dane] email canonicalization for SMIMEA owne… Jakob Schlyter
- Re: [dane] email canonicalization for SMIMEA owne… Paul Wouters
- Re: [dane] email canonicalization for SMIMEA owne… Alexey Melnikov
- Re: [dane] email canonicalization for SMIMEA owne… Alexey Melnikov
- Re: [dane] email canonicalization for SMIMEA owne… Paul Wouters
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… Ben Laurie
- Re: [dane] email canonicalization for SMIMEA owne… Alexey Melnikov
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… John Levine
- Re: [dane] email canonicalization for SMIMEA owne… Nico Williams
- Re: [dane] email canonicalization for SMIMEA owne… James Cloos
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… John Levine
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni
- Re: [dane] email canonicalization for SMIMEA owne… James Cloos
- Re: [dane] email canonicalization for SMIMEA owne… John Levine
- Re: [dane] email canonicalization for SMIMEA owne… Viktor Dukhovni