[Tickets #11021] Sending mail to addresses from an IDN domain

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Ticket URL: http://bugs.horde.org/ticket/11021
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  Ticket             | 11021
  Created By         | Gunnar Wrobel <wrobel at horde.org>
  Summary            | Sending mail to addresses from an IDN domain
  Queue              | Horde Framework Packages
  Version            | Git master
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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Gunnar Wrobel <wrobel at horde.org> (2012-02-22 13:36) wrote:

A customer reported issues with sending mails to IDN domains  
("Validation fails"). I tried to test this and to me it looks as if  
this is currently not possible.

The bug #5180 is closed though so I might just have overlooked something.

I ensured that the PECL IDN package is available.

The error I get is

HORDE: [imp] Validation failed for: test@überfall.de [pid 16934 on  
line 972 of "/var/www/webmail/imp/lib/Compose.php"]

And it looks as though

Horde_Mime::encodeAddress('Räuber <raeuber@überfall.de>', 'UTF-8')

yields an invalid result ('"\274berfall.de>"@')

There are some idn setting available in Horde_Mime_Address but I don't  
see how this IDN parsing could be used when encoding the address.