>> Name your IMAP server and SquirrelMail server side sorting settings.
> Allow server thread sort : false
> Allow server-side sorting : false
Enable info plugin, log into some test account, go to Options -> IMAP
server information and run tests 0, 3-5 with character set set to
iso-8859-1, iso-8859-2, utf-8, iso-8859-15, iso-8859-7, iso-8859-9,
koi8-r, windows-1251, windows-1255, windows-1256, tis-620, gb2312, big5,
euc-jp and euc-kr.
If tests 3-5 don't fail with all these character sets, enable server side
If some character sets fail - disable translations that use them or
recompile courier with --enable-unicode option. If you don't want to run
all those tests, check your courier compilation or enable server side
sorting and ask users to warn you about any 'charset unsupported' errors.
Courier IMAP supports server side sorting. Webmail interface is faster
when sorting is done in IMAP server.