Re: [dane] email canonicalization for SMIMEA owner names
Viktor Dukhovni <ietf-dane@dukhovni.org> Fri, 12 December 2014 00:55 UTC
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Date: Fri, 12 Dec 2014 00:55:50 +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 11:41:30AM +1100, Mark Andrews wrote: > > 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> > > But not port 25. That is blocked too often. Absolutely, this would be an additional service on some other port, indicated via SRV records, and authenticated via DANE TLSA records. The downside of something other than HTTPS or DNS, is that while less likely to be blocked for anti-spam reasons, this is likely to be inaccessible to MUAs inside various firewalled environments. Perhaps a sufficiently light-weight http encapsulation is right after all, and MTA authors might be able to implement just enough HTTPS to still support this as an MTA feature. In Postfix this would be a separate program that runs out of "master.cf", but uses the Postfix table facilities to get the data out of any supported datastore (including LDAP!). This however takes far away from any similarity to the SMIMEA draft as it is today. Is it really time to throw it all away and start again? -- 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