Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?
2020-07-20 02:51:18
On Sun 19/Jul/2020 20:19:52 +0200 John C Klensin wrote:
Would the suggestion that started this thread be consistent with an
applicability statement, either in 2822bis or the separate document for
which draft-klensin-email-core-as-00 is a placeholder, that said something
like "Header field names starting in 'X-' or longer than NNN are prohibited
unless they are legacy registrations in the IANA registry. They MUST NOT
be transmitted in messages and Submission Servers and other systems
encountering them MAY, and in most cases SHOULD, delete them"?
Such a drastic stance may make sense if we need to guard against some kind of
violation. For example, header fields which aim at capturing some traits of
the body of a message which are considered relevant for tracking, profiling, or
similar activities which might be considered intrusive. Such fields can allow
a mail system to link non-delivery notifications and DMARC/ DKIM/ SPF failure
notices which contain text/rfc822-headers only to their missing bodies. That
way, they'd defeat the omission of the body due to privacy concerns.
Just ruminating...
Ale
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- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, (continued)
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, E Sam
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John Levine
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John C Klensin
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Jeremy Harris
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John Levine
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Arnt Gulbrandsen
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John Levine
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John C Klensin
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Arnt Gulbrandsen
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John C Klensin
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?,
Alessandro Vesely <=
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John Levine
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Michael Peddemors
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John Levine
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Hector Santos
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Dilyan Palauzov
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Michael Richardson
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, John C Klensin
- Re: [ietf-smtp] Curious, with this now being associated to emailcore, should list name change?, Hector Santos
- Re: [ietf-smtp] broken signatures, was Curious, John Levine
- Re: [ietf-smtp] broken signatures, was Curious, Brandon Long
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