On 2/24/19, 08:57, Michael J Rubinsky wrote:
The charset is only required if UTF-8 support is not enabled on the IMAP
server, and it is *prohibited* if UTF-8 is enabled on the server.

RFC5256 seems to disagree:
"The SORT command is a variant of SEARCH with sorting semantics for
      the results.  There are two arguments before the searching
      criteria argument: a parenthesized list of sort criteria, and the
      searching charset.

      The charset argument is mandatory (unlike SEARCH) and indicates
      the [CHARSET] of the strings that appear in the searching
      criteria.  The US-ASCII and [UTF-8] charsets MUST be implemented.
      All other charsets are optional."
Is there another RFC that supersedes this requirement, or explicitly documents the prohibition you mention?


What IMAP server are you using? Since you mention this recently started
happening, what has been changed recently?

Courier-imap 5.0.6.  This is why I'm curious about the SORT RFC.
If Courier has implemented SORT incorrectly, I'll need to be able to demonstrate that to the maintainer.

I tend to "pear upgrade" horde at least weekly, but I don't recall what components have recently had updates.
Courier was updated a little more than a month ago.
I don't recall having any issues w/ horde/imp until last night, but I also don't use it daily.


What is the CAPABILITY response from the IMAP log?

* CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE AUTH=PLAIN ACL ACL2=UNION XMAGICTRASH ENABLE UTF8=ACCEPT
<n> OK CAPABILITY completed

So UTF8 is apparently enabled. I don't recall specifically setting a configuration to enable it, so I assume this is a default behavior of Courier.
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