On Wed, Nov 01, 2006 at 12:39:49AM +0000, Chris Lightfoot wrote:
> On Tue, Oct 31, 2006 at 10:15:28PM +0100, Renaud Allard wrote:
[...]
> > So you just have to find an address rewrite rule (or more than one) that
> > translates IDN into punnycode at SMTP time. Exim can do this. However, I
> > have no idea on what the rule will look like.
>
> It's likely to be quite complex--see,
> http://tools.ietf.org/html/rfc3492
> Until/unless exim grows this support itself, I think
> you'll have to call out to perl or something. If you just
> want to do the restricted case of [äåö] it could probably
> be done with a regex, but probably better to do the thing
> properly.
just to follow this up, there are perl modules
Encode::Punycode and IDNA::Punycode which look nice and
easy to use. But I think you have to do it in a rewrite
rule. However, you should check the encoding at SMTP time
in an ACL so that you can produce a meaningful error
message in the case of bad data.
--
``OK, I'm gonna get your money for you. But if you don't get the President of
the United States on that phone, you know what's gonna happen to you?
You're gonna have to answer to the Coca-Cola Company.''
(`Bat' Guano, to Lionel Mandrake; from `Dr. Strangelove')
