[Dovecot] dovecot auth is case insensitive, but fs is sensitive :)

[Noel Butler]

On Wed, 2009-08-19 at 01:41 -0400, Timo Sirainen wrote:

> On Aug 19, 2009, at 1:37 AM, Benny Pedersen wrote:
> 
> > others have found this problem ?
> 
> Dovecot auth isn't case-insensitive. But MySQL is, and I guess you're  
> using it? There are several different ways around it.


Which is not a problem since most (all) MTA's  normally treat user@  as
case insensitive.


Only an incompetently written portal or mail-management
script/software/setup  would allow a user  foo@  *and then*  allow FOO@
or Foo@ etc to be added.

If you use management software that does that, dump it, and if it's
in-house written, I'd kick the programmers ass for allowing it to be so
poorly designed in the first place.


RFC2821
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.
^^^^^^^^^^^^^^^^^
So although permitted, it is only a fool that actually does it.