From: Andrzej Adam Filip (anfixl.wp.pl)
Date: Thu Jan 12 2006 - 16:57:47 CST

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Wietse Venema wrote:
> Andrzej Adam Filip:
> [ Charset ISO-8859-1 unsupported, converting... ]
>
>>Wietse Venema wrote:
>>
>>>Andrzej Adam Filip:
>>>
>>>
>>>>Victor Duchovni wrote:
>>>>[...]
>>>>
>>>>>This is not a bug. It is intentional behaviour. RFC822 addresses are case
>>>>>insensitive. If your configuration depends on the case of the extension,
>>>>>it is wrong.
>>>>
>>>>*YOU* ARE WRONG.
>>>>
>>>>RFC recomendations "discontinues" the long standing tradition.
>>>>
>>>>http://www.ietf.org/rfc/rfc2821.txt
>>>>[...] The local-part of a mailbox MUST BE treated as case sensitive.
>>>>Therefore, SMTP implementations MUST take care to preserve the case of
>>>>mailbox local-parts. Mailbox domains are not case sensitive.
>>>
>>>
>>>There is such a thing as technically correct (case sensitive
>>>mailbox names) and practically correct.
>>>
>>>I would be missing a lot of mail just because some systems to
>>>map all or part of my address to upper case. I don't care that
>>>those systems are broken, I want to receive my mail.
>>
>>We must *clearly* separate two situations:
>>a) MTA acts as relay to another MTA/system
>>According to RFC2821 case of local-part *MUST BE* preserved
>>b) MTA conducts "final delivery"
>>MTA *MAY* treat local-part as case insensitive.
>>
>>I think most of out disagreement has raised from mixing "a" and "b"
>>situations. Some people *want to* use case sensitive local-parts.
>>
>>Sendmail *CAN* treat local parts in case sensitive but I think it is a bad
>>recommendation on *this* mail list :-)
>>http://www.sendmail.org/faq/section4.html#4.17
>
> How many table lookups do you propose for an address mapping or
> access map lookup when a transit MTA handles mail for
> WiEtSeVeNeMaporcupine.org. 2**12 lookups?

Option 0:
* case insensitive lookups by defalut (convert to lowercase before lookup)
* "per domain" option to treat local-part *ONLY* in case sensitive manner
[ *ONE* lookup only ]

P.S.
I personally care a little how postfix handles case (in)sensitivity of
local-part. I merely challenged statement that local-part case insensitivity
is RFC blessed.

--
[en: Andrew] Andrzej Adam Filip : anfipriv.onet.pl : anfixl.wp.pl
All that is necessary for the triumph of evil is that good men do nothing
      -- Edmund Burke, 18th century

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