Strictly speaking, only "Do nothing; let the user do what they want" is
correct. Because, in fact, RFC 822 specifies that case in domain names
must be preserved:

Section 3.4.7 states that data of type dtext must have its case
preserved; 3.3 defines the following lexical token:

domain-literal =  "[" *(dtext / quoted-pair) "]"

and section 6.1, address syntax, explains that what comes after the @
must be assembled basically from domain literals.

In other words, mutt & mozilla apparently are not RFC-822 compliant.

-Alex

PS - DNS is case insensitive, but case-preserving (RFCs 1034, 1035, et
al.), so "do nothing" is the best action from the DNS point of view as
well.





> Message: 1
> Subject: Re: domain case w/ mutt and mozilla
> From: Carl Parrish <cparrish@carlparrish.com>
> To: Plug-discuss <plug-discuss@lists.plug.phoenix.az.us>
> Organization: 
> Date: 17 Mar 2003 10:11:55 -0700
> Reply-To: plug-discuss@lists.plug.phoenix.az.us
> 
> Put me down fully for #1
> 
> Carl P. 
> 
> On Mon, 2003-03-17 at 09:55, Bryce C wrote:
> > I'll put half a vote on #1 and half ion #2.
> > 
> > On Mon, 2003-03-17 at 09:52, Nick Estes wrote:
> > > -----BEGIN PGP SIGNED MESSAGE-----
> > > Hash: SHA1
> > > 
> > > > both Mozilla and mutt munge the case of a domain to lower case,
> e.g.
> > > > "AZOTO.org" becomes "azoto.org".
> > > >
> > > > Do they have a configuration option to stop this insolent
> behavior?
> > > 
> > > And to think, all this time I have not liked mutt for various
> reasons, and
> > > the whole time it's been lowercasing domains so I wouldn't have
> to see
> > > them in caps!  I might just have to switch to mutt now... (-=
> > > 
> > > Just to satisfy my curiosity, I took a poll of the first 6 people
> I found,
> > > and so far 6 out of 6 agree that they would never want uppercase
> letters
> > > in their from address.  However, on the issue of automatically
> making the
> > > address lowercase, there seems to be 3 groups split evenly:
> > > 
> > >  o make the address lowercase
> > >  o don't touch it, let the user do what they want
> > >  o bring up a warning about there being upper case letters
> present
> > > 
> > > 	--Nick
> > > 
> > > -----BEGIN PGP SIGNATURE-----
> > > Version: GnuPG v1.2.1 (GNU/Linux)
> > > Comment: pgpenvelope 2.10.2 - http://pgpenvelope.sourceforge.net/
> > > 
> > > iD8DBQE+df1kv+hjYTGg7s4RArI4AJ4x2Uay5sg8qxay8QX9bjvfSoBZtwCgic8i
> > > o8Bj35bM+lejaD/NNCsTysc=
> > > =oz9c
> > > -----END PGP SIGNATURE-----
> > > 
> > > ---------------------------------------------------
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> -- 
> Carl Parrish (cparrish@carlparrish.com)
> http://www.carlparrish.com
> ---
> Registered Linux User #295761 http://counter.li.org
>

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