Am 02.05.2013 17:53, schrieb Timo Sirainen:
On 25.4.2013, at 16.39, Lutz Preßler <Lutz.Pressler@SerNet.DE> wrote:
on a system with dovecot 2.2 I've got a mailbox containing multiple mails from a person called Krüger, but From: header encoded differently. Some are encoded in UTF-8 normalization form decomposed (as used by Mac OSX), that is u and umlaut accent as sperate combined codepoints instead of one ü:
From: =?utf-8?Q?replaced_Kru=CC=88ger?= <krueger@some.domain>
Searching within roundcube webmail for "krüger" as sender missis this mails.
Roundcube sends (dovecot rawlog): A0003 UID THREAD REFS UTF-8 ALL HEADER FROM {7+}krüger
Is this supposed to work? Haven't done any more debugging (other search variants) or read RFCs. As a user I would expect Unicode equivalence rules be applied (see http://en.wikipedia.org/wiki/Unicode_equivalence)
IMAP requires using i;unicode-casemap by default, as specified by RFC 5051. Then again, others could be supported as well, and it's not really a requirement that the search can't handle more flexible searches.. Anyway, that's what Dovecot currently has implemented, and I guess it doesn't do what you want it to do. But there is a partial solution for this:
http://dovecot.org/patches/2.1/icu-1.2.tar.gz
It probably does what you want, but it only works with fts-lucene.
Could you elaborate a bit why you think i;unicode-casemap does not handle this case?
Is it only applied to the query, but not the header, or vice versa? It seems to me that Step 2 should map both inputs to LATIN CAPITAL LETTER U + COMBINING DIAERESIS.
Regards, Florian