[Tickets #12116] Unicode Domains are passed to sendmail -> Can't send emails to/from unicode domains

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Ticket URL: http://bugs.horde.org/ticket/12116
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  Ticket             | 12116
  Created By         | peter.meier+horde at immerda.ch
  Summary            | Unicode Domains are passed to sendmail -> Can't send
                     | emails to/from unicode domains
  Queue              | IMP
  Version            | 6.0.4
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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peter.meier+horde at immerda.ch (2013-03-14 19:05) wrote:

While IMP and everybody tries to take care that unicode domains are  
passed down in the framework as idn-encoded. Such an e-mail will still  
be passed as unicode to sendmail.

This happens because on L112 of Horde/Mail/Transport/Sendmail.php [1]  
the recipients are parsed (again). So on Line 111 a unicode domain is  
idn-encoded, while on Line 113 they are back as unicode domains.

This makes it impossible to send as a unicode domain user, nor send  
mails to a unicode domain.

[1]  
https://github.com/horde/horde/blob/master/framework/Mail/lib/Horde/Mail/Transport/Sendmail.php#L112