[Tickets #14327] if owner address includes a capital letter it's added in CC: header when Reply to All

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DO NOT REPLY TO THIS MESSAGE. THIS EMAIL ADDRESS IS NOT MONITORED.

Ticket URL: https://bugs.horde.org/ticket/14327
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  Ticket             | 14327
  Created By         | albert.solana at upcnet.es
  Summary            | if owner address includes a capital letter it's added
                     | in CC: header when Reply to All
  Queue              | IMP
  Version            | 6.2.11
  Type               | Bug
  State              | Unconfirmed
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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albert.solana at upcnet.es (2016-04-11 16:20) wrote:

A mailbox called "user.abc at xxx.com" receives a message  with several  
To or Cc: headers.

This message has the mailbox address in To/Cc header and it's  
including at least one capital letter, e.g. "user.ABC at xxx.com".

If this message is Replied to ALL from mailbox "user.abc at xxx.com" then  
Horde adds a CC: header with "user.ABC at xxx.com" !!

That's wrong, Horde doesn't has to add the mailbox address when reply to all.

If tried to reproduce it in demo.horde.org but it doesn't accept  
external messages.

Any idea?