On 2/24/19, 15:56, Michael J Rubinsky wrote:
Yes. RFC 6855 [3], and further clarified in Errata 4029:
Once an IMAP client has enabled UTF-8 support with the "ENABLE
UTF8=ACCEPT" command, it MUST NOT issue a "SEARCH" command that
contains a charset specification. If an IMAP server receives such a
"SEARCH" command in that situation, it SHOULD reject the command with
a "BAD" response (due to the conflicting charset labels). This also
applies to any IMAP command or extension that includes an optional
charset label and associated strings in the command arguments,
including the MULTISEARCH extension. For commands with a mandatory
charset field, such as SORT and THREAD, servers SHOULD reject charset
values other than UTF-8 with a “BAD” response (due to the conflicting
charset labels).
Ok, this clarifies that SEARCH with a charset should be rejected, but
only SEARCH or other commands that "include an optional charset label".
SORT and THREAD do not include an *optional* charset label, they include
a *mandatory* charset label.
The final sentence addresses SORT and THREAD specifically. They still
need have the charset specified (because it is still mandatory), this
just clarifies that it shouldn't be any value other than UTF-8 and risks
rejection/BAD if it is.
Yes?
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