Re: [Emailcore] MDAs (was: Re: Delivered-To issues)

[Alexey Melnikov <[e-mail]>]

Hi all,

> On 8 Jan 2021, at 21:12, John C Klensin <[e-mail]> wrote:
> 
> --On Friday, January 8, 2021 07:30 -0800 Ned Freed
> <[e-mail]> wrote:
> 
>> ...
>>> Consider:
>> 
>>> 2.3.11.  Mailbox and Address
>>> ...
>>>    standard mailbox naming convention is defined to be
>>>    "local-part@domain"; contemporary usage permits a much
>>>    broader set of applications than simple "user names".
>>>    Consequently, and due to a long history of problems when
>>>    intermediate hosts have attempted to optimize transport
>>>    by modifying them, the local-part MUST be interpreted and
>>>    assigned semantics only by the host specified in the
>>>    domain part of the address.
>> 
>> There's just one problem with this text: This isn't true. It
>> has never been true, and no amount of repetition, compliance
>> language, or anything else will make it true.
> 
>> The obvious example, which I have pointed out many times, is
>> when mailing lists have to decide whether or not a
>> subscribe/unsubscribe request is a match to an address on the
>> list. This means choosing whether or not other people's
>> local-parts are case-sensitive. (There's also the issue of
>> things like unnecessary quoting, which in the interests of my
>> own sanity I'm going to ignore.)
>> ...
> 
> Ned, this may be another fork in the conversation, but...

Yes, please. Let’s change subject and create a new ticket, if needed.

Best Regards,
Alexey, as co-chair