Mercurial > dovecot > original-hg > dovecot-1.2
annotate TODO @ 3670:81e73a6714c1 HEAD
1.0alpha4
author | Timo Sirainen <tss@iki.fi> |
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date | Thu, 20 Oct 2005 12:09:49 +0300 |
parents | e1888f3d3423 |
children | d362e79fdb97 |
rev | line source |
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3670 | 1 - with blocking passdb we're not caching lookups if the password was wrong |
2 - blocking passdb/userdb works only as root since it can't access | |
3 /var/run/auth-worker.* files.. | |
4 - configurable syslog facility | |
5 - LIST replies 2049 bytes (more would come) -> dovecot gets stuck? | |
3575 | 6 - auth: it's not possible to have two same passdbs/userdbs with different |
7 settings | |
8 - LDA: empty mail gives an error. <LF> mail gives another error. | |
9 - LDA: "message <$MSGID> for $USER: $action" logging | |
3541 | 10 - if PAM child process doesn't finish within a minute, kill it |
11 - maildir: hardlink copying + keywords are broken | |
12 - Support listening in multiple sockets?.. | |
13 - Thunderbird+pop3 DELE error..? | |
3450 | 14 - calls fsync()s etc. less often (when copying). optionally disable them. |
15 - stop using atol(), atoi(), strtoul() etc. in places where we actually | |
16 care about what they return, and rather create our own function which | |
17 checks if the input overflows the integer, and if so call i_fatal() | |
18 - for master/config rewrite: make sure the log changes will work | |
19 - when sorting maildir files, sort based on Mxxxx first so the files are | |
20 sorted always in ascending order. required for proper out-of-quota uidlist | |
21 handling | |
22 - Panic: file mail-index.c: line 844 (mail_index_sync_from_transactions): | |
23 assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
24 - after some locking timeouts: mbox-lock.c: line 518 (mbox_lock): assertion failed: (lock_type == F_RDLCK || mbox->mbox_lock_type != F_RDLCK) | |
25 | |
26 - Corrupted transaction log file dovecot.index.log: record size wrong (type 0x4, 20 % 12 != 0) | |
27 -> mail-index.c: line 841 (mail_index_sync_from_transactions): assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
28 | |
29 - subscribe #maildir -> LSUB "" * -> probably not listed? | |
30 * 1807 EXISTS | |
31 * 0 RECENT | |
32 * OK [UNSEEN 1] First unseen. | |
33 * OK [UIDVALIDITY 1106090975] UIDs valid | |
34 * OK [UIDNEXT 38157] Predicted next UID | |
35 x OK [READ-WRITE] Select completed. | |
36 x store 500:* +flags.silent \deleted | |
37 * 31 RECENT | |
38 x OK Store completed. | |
3048 | 39 |
3450 | 40 - dovecot-auth workers: create a separate dovecot-pam worker which shares |
41 pretty much all code with dovecot-auth worker but isn't linked against | |
42 any libraries. or..? this might be difficult to do, especially because the | |
43 workers currently can handle any kind of passdb/userb requests. perhaps | |
44 there should be a completely separate simple PAM authenticator binary. | |
45 - namespaces: add new "auto_disable" flag so if the mailbox can't be opened | |
46 (eg. file doesn't exist), just ignore the problem and disable the namespace | |
47 diff -u -r1.44 cmd-list.c | |
48 --- src/imap/cmd-list.c 5 Feb 2005 18:07:26 -0000 1.44 | |
49 +++ src/imap/cmd-list.c 15 Mar 2005 16:15:27 -0000 | |
50 @@ -213,7 +213,7 @@ | |
51 ctx->inbox && cur_ref == ctx->ref, | |
52 ns->sep); | |
53 if (*cur_ref != '\0' || *cur_prefix == '\0') | |
54 - match = IMAP_MATCH_CHILDREN; | |
55 + match = ns->hidden ? IMAP_MATCH_NO : IMAP_MATCH_CHILDREN; | |
56 else { | |
57 len = strlen(cur_prefix); | |
58 if (cur_prefix[len-1] == ns->sep) | |
59 | |
60 | |
61 - auth master refcounting when handling user/request? | |
62 | |
63 - buffer_create_data() behavior has changed from silent-truncating to | |
64 hard-crashing. See if it breaks anywhere (PAM!) | |
65 - PAM / checkpassword should use passdb-blocking | |
66 - if capability is sent in greeting, it's not waiting for AUTH=xx.. | |
67 - if ssl isn't compiled in, it doesn't complain anything if it's tried to | |
68 be used .. and configure summary even says it's enabled | |
69 - SSL_read in -lssl -> no | |
70 | |
71 - deleting lots of messages for rarely opened box seems to cause trouble: | |
72 IMAP(cras:17105): Cached message offset lost for seq 93 in mbox file /home/cras/mail/bugtraq | |
73 IMAP(cras:21802): mbox sync: UID inserted in the middle of mailbox /home/cras/mail/bugtraq (816584 > 816580) | |
74 IMAP(cras:21802): mbox sync: UID inserted in the middle of mailbox /home/cras/mail/bugtraq (816598 > 816580) | |
75 | |
76 - solaris sendfile is broken? | |
3048 | 77 |
78 mail-index-transaction.c: line 467 (mail_index_transaction_add_last): | |
79 assertion failed:(idx == size || data[idx].uid1 <= update.uid1) | |
80 | |
3087 | 81 - keywords: |
82 - add some limits to how many there can be | |
83 - don't return \* in PERMANENTFLAGS when we're full | |
84 - remove unused keywords? | |
2774 | 85 |
86 - caching | |
87 - force bits should be used only for nonregistered fields | |
88 - change envelope parsing not to use get_headers() so imap.envelope can | |
89 actually be cached without all the headers.. | |
90 - compression should drop fields with last_used < | |
91 (latest_mail_index_date - month) | |
92 - when parsing mbox or saving message, parse the mail through index-mail | |
93 so things gets saved into cache immediately | |
3450 | 94 - we could try compressing same field values into a single |
95 location in cache file. | |
96 - support caching all message headers. this could be useful when | |
97 indexes are in local disk but actual mails are accessed through NFS. | |
2774 | 98 |
3087 | 99 - mbox |
3543 | 100 - if we made no actual visible changes to the mbox, we probably should |
101 update access time == mtime at the end of syncing | |
3541 | 102 - size.physical isn't cached, but should it even be? .. |
3087 | 103 - syncing existing indexes takes 4x longer than creating new one, why? |
104 - how well does dirty sync + status work? it reads the last mail every | |
105 time? not very good.. | |
106 - always add empty line. make the parser require it too? syncing should | |
107 make sure there always exists two LFs at end of file. raw-mbox-stream | |
108 should make sure the last message ends with LF even if it doesn't exist | |
109 in the file | |
2774 | 110 - COPY doesn't work to itself (lock assert crash) |
2143 | 111 - keep mbox lock for two extra seconds after sync |
112 - move /var/mail/user to ~/mbox if ~/mbox exists.. supposedly this | |
113 could be useful if /var/mail doesn't have quota, but ~/mail does. | |
114 now, what do we then do if we can move only some of the mails?.. | |
115 - if we can't create dotlock file for mbox, make sure it still can be | |
116 selected in read-only state | |
117 | |
3087 | 118 - maildir |
119 - if indexes exist but dovecot-uidlist doesn't, it's not tried to be | |
120 recreated | |
121 - hardlink copying doesn't update indexes | |
122 - rename foo foo.xyz -> infinite loop possible? | |
123 - we probably shouldn't do duplicate detection/fixing?.. or at least stat() | |
124 the old file before trying, because we might have just previously seen | |
125 the old file and then new file and then we try to fix it.. | |
3450 | 126 - with pop3 don't move messages from new/ to cur/ before RETR |
3087 | 127 |
2143 | 128 - index |
3087 | 129 - if uoff_t or time_t size changes, don't rebuild indexes because they |
130 don't use them. just rebuild cache file. | |
131 - mail_index_lookup_ext() doesn't handle resizes between views. probably | |
132 needs size_t *size_r parameter added.. | |
2143 | 133 - optimize initial left_idx in mail_index_lookup_uid_range() |
134 - if log file is lost, generate it from old and new index | |
3087 | 135 - transaction log: when replacing log with a same sequence, we remove it |
136 from log's file list, but we don't do anything to existing log views. | |
137 this can crash later in mail_transaction_log_view_set() because 'first' | |
138 is from log list, while we're comparing it into view->tail which it never | |
139 is. also overwriting it leaks memory.. | |
140 - read-only support for mailboxes where we don't have write-access | |
141 - when mailbox is deleted/renamed and someone else had it open, we get | |
142 stat() error messages in log file. | |
143 - sort: we could create alternative indexes for different sort conditions. | |
144 sort code itself already supports this optimization. | |
2143 | 145 |
3087 | 146 - lib-storage |
147 - index_removal_timeout gets leaked in some conditions. how? | |
148 - subscribe: IMAP(anonymous): open(anonymous/mail/.temp...) failed: Permission denied | |
149 - subscriptions file should contain namespace prefixes. at least optionally. | |
150 there's the subscriptions = yes setting now for namespaces.. do it so that | |
151 if prefix = "" has subscriptions, it contains prefixes. otherwise not. | |
152 - should we allow following symlinks in mbox/maildirs? they are now. | |
153 - if we implement shared mailboxes with shared indexes, never do that or | |
154 others could symlink your personal mailboxes and see the indexes | |
155 created for it which may contain envelope etc. data | |
156 - this allows circular mailbox hierarchies which should be prevented by | |
157 eg. allowing max. 20 hierarchies. | |
860 | 158 - limit folder hierarchy levels? user can now create eg. a/a/a/a/... |
159 and then start renaming them from end to beginning, which probably will | |
160 at some point start causing syscall failures which will fill up logs. | |
3087 | 161 |
162 - login | |
163 - Digest-MD5: support integrity protection, and maybe crypting. Do it | |
164 through login process like SSL is done? | |
165 - x login foo bar | |
166 x NO Authentication failed. | |
167 x login cras pass | |
168 * BYE Disconnected for inactivity. | |
169 ^ but it's not disconnecting! (buggy dovecot-auth not replying) | |
170 - imap-login: Authenticate PLAIN failed: Authentication failed: | |
171 Authentication server isn't connected, try again later.. [127.0.0.1] | |
172 ^ NO Authentication failed. (should be Temporary login failure!) | |
173 - if auth process dies, login process should retry authentication if | |
174 possible. or if not, disconnect the client so it doesn't think the auth | |
175 failed. | |
176 - send client IP immediately after accept() to master process. make sure | |
177 master shows the IP if login dies unexpectedly. master should probably | |
178 also kill the login process if it doesn't kill itself soon enough.. or | |
179 maybe just log the IP immediately. | |
474 | 180 |
3087 | 181 - auth |
182 - APOP is broken? | |
183 - support specifying hex/base64 encoding in password scheme. for example | |
184 {plain-md5.base64} | |
185 - auth protocol: make sure values can't have tabs/lfs | |
186 - auth cache: cache userdb data too. | |
187 - remove system_user and allow returning multiple gids instead. | |
188 - SIGHUP restarts auth processes .. but does it wait until they've finished | |
189 with all requests? no. | |
3541 | 190 - post-login-sql-command (userdb command doesn't do because of dovecot-lda) |
3087 | 191 - does dovecot-auth really break when it runs out of fds? |
192 - dovecot-auth should limit how fast authentication requests are allowed from | |
193 login processes. especially if there's one login/connection the speed | |
194 should be something like once/sec. also limit how fast to accept new | |
195 connections. | |
196 - support read-only logins. user could with alternative password get only | |
197 read-access to mails so mails could be read relatively safely with | |
198 untrusted computers. Maybe always send [ALERT] about the previous | |
199 read-only login time with IP? | |
526 | 200 |
3087 | 201 - master |
202 - pipe() failed: Too many open files - fine, but don't log it 1000 times | |
203 a second | |
204 - configurable syslog prefix | |
205 - SIGHUP rather shouldn't restart listening sockets if they didn't change.. | |
3450 | 206 - if there are duplicate settings, complain about it |
3087 | 207 |
208 - quota | |
209 - support Maildir++ quota | |
210 - if dovecot-uidlist can't be written, assume the new mails have UIDs | |
211 beginning from uidlist.next_uid. Whenever mails are expunged, overwrite | |
212 the next_uid field with the current highest next_uid. Whenever we have | |
213 assumed UIDs and uidlist gets updated, throw the client out with | |
214 "inconsist mailbox". | |
215 - make sure all syscalls check for ENOSPACE (and ENOACCESS while at it) | |
216 | |
217 - ssl | |
218 - add setting: ssl_options = bitmask. by default we enable all openssl | |
219 workarounds, this could be used to disable some of them | |
220 - open("/var/run/dovecot//ssl-parameters.dat", O_RDONLY|O_LARGEFILE) =-1 ENOENT | |
221 ^ loops forever | |
222 - gnutls support isn't working | |
634 | 223 - OpenSSL: support generated DH parameters |
1250 | 224 - SSL: Support password protected key files. Support reading the password |
2143 | 225 from user at runtime (dovecot startssl or something). currently it just |
226 hangs. | |
965 | 227 |
3087 | 228 - search |
229 - message header search: we should ignore LWSP between two MIME blocks | |
1250 | 230 - message_body_search() could accept multiple search keywords so we |
231 wouldn't need to call it separately for each one (so we wouldn't need | |
232 to parse the message multiple times). | |
233 - message_body_search() could support NULL MessagePart and the searching | |
234 could be done while parsing the message. this would need changes to | |
235 message_parse() as well. | |
236 - could optionally support scanning inside file attachments and use | |
237 plugins to extract text out of them (word, excel, pdf, etc. etc.) | |
238 - use a trie index for fast text searching, like cyrus squat? | |
239 - Create our own extension: When searching with TEXT/BODY, return | |
240 the message text surrounding the keywords just like web search engines | |
241 do. like: SEARCH X-PRINT-MATCHES TEXT "hello" -> * SEARCH 1 "He said: | |
242 Hello world!" 2 "Hello, I'm ...". This would be especially useful with | |
243 the above attachment scanning. | |
0 | 244 |
3087 | 245 - lib |
246 - ioloop-kqueue.c patch | |
247 - dotlocking: stale_timeout should probably take into account how old the | |
248 file is.. so uses more time with more recent locks.. | |
249 | |
250 - lib-charset | |
251 - utf8_toupper() is a must. and a bit difficult if we want to do it right. | |
252 - add support for other things than iconv() as well? we could reuse | |
253 the code from cyrus or courier | |
254 - cache iconvs? they'd probably be faster if we just reset the | |
255 conversion instead of opening new one every time. and there will likely | |
256 be only one or two charsets which are used for nearly all conversions. | |
257 | |
258 - general | |
259 - rfc2231 continuation support (useless?) | |
1553 | 260 - rfc2557 support for BODYSTRUCTURE, as specified by RFC3501 |
3541 | 261 - lmtp server - is it needed? |
1250 | 262 - create indexer binary |
3087 | 263 - ~/.dovecotrc to override system wide settings. namespace settings should |
264 override all the previous namespace settings instead of adding new. | |
265 - ESTALE handling for NFS safety | |
266 - option to disable SORT, SEARCH and other memory/cpu-intensive features. | |
267 defaults and per-user by dovecot-auth. | |
268 - dotlock overriding is racy, but it's pretty difficult to fix it. Also | |
269 overriding someone else's dotlock in shared folder isn't possible. These | |
270 could be fixed by having separate lock process running as root, which | |
271 would chown() the file for another uid and then unlink() it as that user. | |
272 One problem with that is that if malicious user sets setuid+execute bits | |
273 on for the file, he could run the file and get changed to the new uid. | |
274 That hopefully shouldn't matter much since the new uid should be user | |
275 with minimum possible privileges. Anyway, optional.. | |
276 - things break if next_uid gets to 2^32 | |
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277 |
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278 capabilities: |
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279 - preferrably all should be possible to #ifdef away by a configure |
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280 option (--without-capabilities=acl,namespace,...) |
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281 - possibility to disable them from config file |
3087 | 282 - THREAD=ORDEREDSUBJECT - although pretty useless I'd think. |
376
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283 - acl (rfc2086, draft-ietf-imapext-acl), namespace (rfc2342) |
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284 - probably do it like cyrus. "user.<username>" to access other |
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285 users, with "" defaulting to "user.<myself>". these should be |
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286 configurable however. |
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287 - shared namespaces? maybe configurable in config file |
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288 - easiest way to do ACL would be to use unix modes, but is that |
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289 useful at all? Well, ACL2 has a bit better support for that, so |
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290 maybe we could support it. |
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291 - otherwise gets a bit trickly, we could keep all mail in "imapmail" |
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292 group and 0600/0700 mode by default, but when mail is shared to others, |
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293 the group read/write access bits would be set. or alternatively we |
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294 could launch another imap process to handle it, which we should support |
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295 anyway. ACLs could be stored into ".acl" ascii file in each folder. |
480 | 296 - support for private and shared flags, configurable by mailbox admin. |
297 this isn't in any draft yet, but ACL2 author was going to create one. | |
298 [SHAREDFLAGS (...)] would specify which ones are shared, don't know yet | |
299 how they would be configured. | |
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300 - quota (rfc2087, draft-cridland-imap-quota) |
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301 - give filesystem values only to admins |
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302 - support for Maildir++, probably no need to support more. |
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303 quota capability supports complex quota configuration, but if |
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304 no mailer supports them we probably shouldn't bother either |
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305 - id (rfc2971) |
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306 - must be configurable what gets sent, default to only name=Dovecot |
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307 - separate pre/post-login settings |
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308 - optionally log configured parts of the client information, but only |
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309 once, probably at the same time as logging "Logged in", |
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310 "Disconnected", etc. |
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311 - remember to force truncating values longer than 30 chars, |
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312 especially before logging |
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313 - mailbox-referrals (rfc2193) |
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314 - this is useful whenever we would otherwise need to make the |
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315 connection ourself. for example load balancing and shared mailboxes |
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316 requiring another UID to run. |
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317 - this rfc defines no exact way for server to detect if client |
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318 supports referrals or not. I don't think there's much point in |
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319 supporting only referrals, as most clients don't support them. |
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320 Instead we should return referrals when we know that client |
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321 supports them, otherwise do the connecting ourself. If client |
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322 issues RLIST or RLSUB command, it's safe to assume it supports |
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323 referrals. |
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324 - for load balancing this works just fine, but what about shared |
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325 mailboxes which require different UID? If we login with our own |
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326 username, we end up with our own UID instead of what we wanted. |
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327 IMAP URLs don't support separated authorization id which would |
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328 have made this very easy.. We could give the "userid@group" as |
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329 userid, but clients probably treat it as different userid and |
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330 ask the password again. |
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331 - problems, problems, .. maybe not worth the trouble. |
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332 - drafts: |
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333 - http://www.imc.org/ids.html |
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334 - annotate (draft-ietf-imapext-annotate) |
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335 - per-message annotations. this will be major change. especially |
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336 because currently there's no suitable storage for them, and |
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337 they'll probably change all the time.. maybe if we moved into |
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338 berkeley db to store the .data file and these annotations. |
1178 | 339 - this is separate problem from index files. indexes are treated as |
340 temporary files, annotations are permanent data. we'd have to | |
341 support non-db way to do this too, which would probably be just a | |
342 simple (slow) text file. | |
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343 - annotatemore (draft-daboo-imap-annotatemore) |
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344 - server and per-mailbox annotations. much easier than |
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345 per-message annotations, but they'd be easier to place into |
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346 db as well. |
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347 - binary (draft-nerenberg-imap-binary) |
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348 - perhaps not too useful. I'd like to make Dovecot fully |
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349 binary-safe though. |
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350 - view (draft-ietf-imapext-view) |
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351 - slow, complex, luckily draft expired almost two years ago. |
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352 i hope i don't have to implement this :) |
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353 - can be done client-side just fine (evolution's virtual folders) |