From: Andrzej Adam Filip (anfixl.wp.pl)
Date: Thu Jan 12 2006 - 16:30:06 CST

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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

--
[en: Andrew] Andrzej Adam Filip : anfipriv.onet.pl : anfixl.wp.pl
http://anfi.homeunix.net/ Netcraft Site Rank: 5374766
All that is necessary for the triumph of evil is that good men do nothing
      -- Edmund Burke, 18th century

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