Ticket 5836 will track the display part of this, so I'm resolving this ticket.

Yes - I thought I had did that before.  Hmmm...



Anyway, this will be a non-trivial thing to implement since it will 
effect BC - because the obvious place to do this conversion, 
MIME_Headers, is split between horde and IMP.

Michael, since you already committed the send support, is there a 
reason you changed this to a high priority bug? Can this be resolved 
now, or should it be converted into a medium priority enhancement for 
displaying IDN addresses?

Well it is an established RFC, and without this support is entirely 
impossible to send to these e-mail addresses, so I think that makes it 
an important bug to fix (ex. consider a site running IMP 4.2 4 years 
from now when everyone is using IDN.)  Whether other tools down the 
mail chain fail to send these messages is irrelevant.



More important, the fix to make this work was pretty easy.  We just 
need to make sure before we send a message that we encode.  We can 
carry around the unencode address at all other times internally.



http://lists.horde.org/archives/cvs/Week-of-Mon-20070326/066469.html



This still leaves the issue of decoding these IDN e-mail addresses for 
display purposes, but that is a UI enhancement request rather than a 
bug.

Okay. It's not so important to give it the highes priority.
No, that's not right. DENIC offers umlaut domains. The name resulution 
still works with current DNS servers as these domain names will be 
encoded to regular ascii caracters.



I have access to the statistics of a large german webhoster which 
hosts far over 100.000 domains. At the moment, 2.77 % of the customers 
have umlaut domains. This value is constantly improving.



The customers want to use the horde webmailer but can not send emails 
to umlaut domains. Maybe it is not so important to implement this 
feature with highest priority, but it still a missing and requested 
feature.



I think it is worth to implement this feature as soon as possible.

Uh, why? So far this almost only a nice marketing gag, that noone uses 
seriously. Not even all DNS servers have been updated to make this work.

It's a nice to have, but definitely not high priority.

This needs to be done before IMP 4.2.  We should use either PEAR's 
Net_IDNA or PECL's idn.

It is now possible to register for domains containing umlauts. 
Browsers search for these IDN-domains by enconding them in punny-code. 
Unfortunatelly horde with the module imp can not send emails to those 
domains.



It would be great to support these domains, e. g. mail@schöne-welt.info



Tank you.