At Fri Nov 15 17:53:22 2002, Steve Thomas wrote:
>
> I wouldn't recommend doing this, though. E-mail addresses are not case
> sensitive,
That's not correct.
The local-part (the bit to the left of the '@' symbol) *is*
case-sensitive. It's only the domain (the bit after the '@') that's
not case-sensitive.
>From RFC2821 (section 2.4):
Verbs and argument values (e.g., "TO:" or "to:" in the RCPT command
and extension name keywords) are not case sensitive, with the sole
exception in this specification of a mailbox local-part (SMTP
Extensions may explicitly specify case-sensitive elements). That is,
a command verb, an argument value other than a mailbox local-part,
and free form text MAY be encoded in upper case, lower case, or any
mixture of upper and lower case with no impact on its meaning. This
is NOT true of a mailbox local-part. 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. In particular, for some hosts the
user "smith" is different from the user "Smith". However, exploiting
the case sensitivity of mailbox local-parts impedes interoperability
and is discouraged.
Martin
--
Martin Radford | "Only wimps use tape backup: _real_
[EMAIL PROTECTED] | men just upload their important stuff -o)
Registered Linux user #9257 | on ftp and let the rest of the world /\\
- see http://counter.li.org | mirror it ;)" - Linus Torvalds _\_V
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