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10/17/25
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Comment on [#10726] Exchange 2003 IMAP error: Specified character set not supported.
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> Issue is that Exchange 2003 does not appear to support UTF-8 in > SEARCH queries (which is kind of ridiculous in this day and age...) > RFC 3501 only requires compliant servers to handle US-ASCII. > > Although, in your situation, we are just searching by flags, so there > is no reason to even add CHARSET information. So I've made this > change. > >> Things are getting funnier. I accidentally changed sort order in DIMP >> interface from subject to thread and suddenly the mails where listed >> as expected. Further tests showed that they only get listed when >> sorted by thread. Any clue? > > This is completely expected. The THREAD extension REQUIRES the > server to handle UTF-8 queries (which begs the question: the server > can obviously handle UTF-8, so why does it now allow UTF-8 support in > the default SEARCH command?) > > This is probably a good idea to complete sanity checking in the > search query when a bad charset is used. The only option is to > downconvert to us-ascii.
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