Re: [EAI] [IETF] Multiple Addresses [ was: Internationalized Email Internet Draft]
John C Klensin <john-ietf@jck.com> Wed, 19 October 2016 13:25 UTC
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Date: Wed, 19 Oct 2016 09:25:10 -0400
From: John C Klensin <john-ietf@jck.com>
To: nalini.elkins@insidethestack.com
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Cc: Harish Chowdhary <harish@nixi.in>, ima@ietf.org
Subject: Re: [EAI] [IETF] Multiple Addresses [ was: Internationalized Email Internet Draft]
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--On Friday, October 14, 2016 15:07 +0000 nalini.elkins@insidethestack.com wrote: >... >> (4) Multiple addresses for one user (and Section 4). >> Keeping in mind that many people maintain a number of >> identities, and even multiple email addresses, for different >> purposes, I >don't understand what point you are trying to >> make with this section. > Sure. People have multiple email addresses for different > reasons. The question was actually with aliases. Maybe it > is not possible to have all email consolidated to one box. For > example, if I want to have two mailboxes: > nalini@mymailserver.com and नलिनी@mymailserver.com > (or नलिनी@[myidnserver].[myinternationaltld]) all > come to one mailbox is that possible? Should it be possible? > I *think* people want that. I think we will know as this > all takes off. One more comment on this. I'm encouraged by John Bucy's comment that Gmail will support this and I hope the other large providers will too. However, to put your question in perspective, ability to create aliases for mailbox names has been common in Internet email systems (and supported by every publicly-available one I have encountered) for a very long time. >From the perspective of the SMTP specs, even having upper and lower case ASCII match in the local-part is an aliasing issue, not a fundamental requirement or transformation. Expanding an otherwise well-designed and "8 bit clean" mail delivery system and server to treat an incoming non-ASCII local-part as an alias for an all-ASCII one should be simply a matter of modifying the server to accept non-ASCII local parts and then disabling any internal syntax checks that prohibit such addresses. The harder problems lie elsewhere. If the server for example.com accepts Joe.bLogs@example.com and an alias for, and equivalent to, joe.bloggs@example.com, whether Joe's MUA and submission servers will allow sending from the former address form is a matter for those servers, not the mailbox name or delivery systems. Some will, some won't. Similarly, there are a few different ways to handle aliases in terms of what, if anything, is done to the message headers. One can imagine a number of interesting issues in IMAP / POP interfaces or in receiving MUAs and that number increases when non-ASCII addresses are added in. > Can you point me to some of that work? In (non-IETF) tutorials about Internet email and documents for specific systems, yes. Other than a comment here and there (with case sensitively as a good example), the IETF standards have deliberated avoided these issues because handling of mailbox names and aliases are considered to be purely local matters. best, john
- [EAI] [IETF] Internationalized Email Internet Dra… Harish Chowdhary
- Re: [EAI] [IETF] Internationalized Email Internet… HANSEN, TONY L
- Re: [EAI] [IETF] Internationalized Email Internet… John C Klensin
- Re: [EAI] [IETF] Internationalized Email Internet… nalini.elkins
- [EAI] [IETF] Content Issues [ was: Internationali… nalini.elkins
- [EAI] [IETF] Homographic Attacks [was: Internatio… nalini.elkins
- [EAI] [IETF] Display of Email Addresses [was: Int… nalini.elkins
- [EAI] [IETF] Arabic / Bidirectional Writing Syste… nalini.elkins
- [EAI] [IETF] Multiple Addresses [ was: Internatio… nalini.elkins
- Re: [EAI] [IETF] Display of Email Addresses [was:… Andrew Sullivan
- [EAI] [IETF] Relational Databases: UTF8 [was: Int… nalini.elkins
- Re: [EAI] [IETF] Display of Email Addresses [was:… nalini.elkins
- [EAI] [IETF] Migration / Backward Compatibility [… nalini.elkins
- [EAI] [IETF] Terminology [was: Internationalized … nalini.elkins
- [EAI] General issues and strategy (was: Re: Conte… John C Klensin
- Re: [EAI] [IETF] Internationalized Email Internet… nalini.elkins
- Re: [EAI] General issues and strategy (was: Re: C… nalini.elkins
- Re: [EAI] [IETF] Display of Email Addresses [was:… John C Klensin
- Re: [EAI] [IETF] Content Issues [ was: Internatio… Franck Martin
- Re: [EAI] [IETF] Content Issues [ was: Internatio… John C Klensin
- Re: [EAI] [IETF] Multiple Addresses [ was: Intern… John Bucy
- Re: [EAI] [IETF] Multiple Addresses [ was: Intern… nalini.elkins
- Re: [EAI] [IETF] Multiple Addresses [ was: Intern… John C Klensin