mail forwarding problem

[zephod at cfl.rr.com]

----- Original Message -----
From: Bruno Wolff III <bruno at wolff.to>
Date: Friday, May 25, 2007 12:30 pm
Subject: Re: mail forwarding problem
To: "Mikkel L. Ellertson" <mikkel at infinity-ltd.com>
Cc: For users of Fedora <fedora-list at redhat.com>

> On Fri, May 25, 2007 at 11:17:07 -0500,
>  "Mikkel L. Ellertson" <mikkel at infinity-ltd.com> wrote:
> > By default, e-mail addresses are converted to all lower case. You
> > will have problems with mixed or upper case user names and/or e-mail
> > addresses. It is possible to reconfigure your mail local mail server
> > to preserve the case, but it would be better to change your user
> > name to all lower case. (Mixed case user names break a bunch of
> > specifications...)
> 
> The RFCs specify that the local part of email addresses are case 
> sensitive.On many hosts case mapping is done when delivering the 
> message locally,
> but no MTAs should be messing with it until that point.

It Looks like Bruno is correct. From RFC 2821, Simple Mail Transfer
Protocol, Para. 2.4 General Syntax Principles and Transaction Model:

...
"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."

Steve