Mercurial > dovecot > original-hg > dovecot-1.2
annotate TODO @ 4128:9198a457f022 HEAD
1.0.beta4 released
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Sun, 02 Apr 2006 19:52:16 +0300 |
| parents | becee8ae64a6 |
| children | 66d6fd7c368e |
| rev | line source |
|---|---|
| 4128 | 1 Warning: Our dotlock file /home/cras/.dovecot.convert.lock was modified (1143843911 vs 1143843915), assuming it wasn't overridden (kept it -4 secs) |
| 2 - convert-tool copied mbox INBOX into ~/Maildir/.inbox/ | |
| 3 - convert-tool doesn't read dovecot.conf | |
| 4 - when killing master process, the imap/pop3 processes should be killed too | |
| 5 - dbox: append_offset in header shouldn't be trusted | |
| 6 - dbox: show in index if there are expunge-flagged mails in the mailbox | |
| 7 - controldir for mboxes too? | |
| 8 - put subscriptions file to controldir? | |
| 9 - ability to specify default password scheme with passwd-file | |
| 10 - cache file can be broken quite easily with imaptest | |
| 11 - Cache file code doesn't notice 32bit -> 64bit CPU change and crashes | |
| 12 (shouldn't crash anyway!) | |
| 13 - add remote IP to pop3_logout_format, %R is broken | |
| 14 - add imap_logout_format | |
| 15 - outlook-idle workaround doesn't work? | |
| 16 - quota code should probably be always doing some quota_set_critical() | |
| 17 instead of using mail_storage_set_critical(), so that quota_last_error() | |
| 18 would work properly | |
| 19 - x search charset asdf all -> should fail | |
| 20 - passdb passwd + passdb shadow -> passdb_password isn't reset to NULL | |
| 21 - EXAMINE box, APPEND box -> fails | |
| 22 - when pipelining login command + post-login commands, login process should | |
| 23 pass the command to imap/pop3 process (at least one pop3 client does this) | |
| 3995 | 24 - lda: change "unsupported feature" error to something better |
| 25 - imaptest: imap-login: Master sent reply with unknown tag 1 | |
| 26 - client closed connection at the exact same time master was logging it | |
| 27 in? master_request_abort() | |
| 28 - delete >30min old dovecot.index.log.2 files when opening index? | |
| 3904 | 29 - dict-server should have some config file which lists the allowed dicts |
| 3744 | 30 - inetd: pop3-login logs in with imap executable |
| 3670 | 31 - with blocking passdb we're not caching lookups if the password was wrong |
| 32 - LIST replies 2049 bytes (more would come) -> dovecot gets stuck? | |
| 3904 | 33 - LDA: empty mail gives an error. |
| 3575 | 34 - LDA: "message <$MSGID> for $USER: $action" logging |
| 3541 | 35 - if PAM child process doesn't finish within a minute, kill it |
| 36 - Support listening in multiple sockets?.. | |
| 37 - Thunderbird+pop3 DELE error..? | |
| 3450 | 38 - calls fsync()s etc. less often (when copying). optionally disable them. |
| 39 - stop using atol(), atoi(), strtoul() etc. in places where we actually | |
| 40 care about what they return, and rather create our own function which | |
| 41 checks if the input overflows the integer, and if so call i_fatal() | |
| 42 - when sorting maildir files, sort based on Mxxxx first so the files are | |
| 43 sorted always in ascending order. required for proper out-of-quota uidlist | |
| 44 handling | |
| 45 - Panic: file mail-index.c: line 844 (mail_index_sync_from_transactions): | |
| 46 assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
| 47 - after some locking timeouts: mbox-lock.c: line 518 (mbox_lock): assertion failed: (lock_type == F_RDLCK || mbox->mbox_lock_type != F_RDLCK) | |
| 48 | |
| 49 - Corrupted transaction log file dovecot.index.log: record size wrong (type 0x4, 20 % 12 != 0) | |
| 50 -> mail-index.c: line 841 (mail_index_sync_from_transactions): assertion failed: (hdr.messages_count == (*map)->hdr.messages_count) | |
| 51 | |
| 52 - subscribe #maildir -> LSUB "" * -> probably not listed? | |
| 53 * 1807 EXISTS | |
| 54 * 0 RECENT | |
| 55 * OK [UNSEEN 1] First unseen. | |
| 56 * OK [UIDVALIDITY 1106090975] UIDs valid | |
| 57 * OK [UIDNEXT 38157] Predicted next UID | |
| 58 x OK [READ-WRITE] Select completed. | |
| 59 x store 500:* +flags.silent \deleted | |
| 60 * 31 RECENT | |
| 61 x OK Store completed. | |
| 3048 | 62 |
| 3450 | 63 - dovecot-auth workers: create a separate dovecot-pam worker which shares |
| 64 pretty much all code with dovecot-auth worker but isn't linked against | |
| 65 any libraries. or..? this might be difficult to do, especially because the | |
| 66 workers currently can handle any kind of passdb/userb requests. perhaps | |
| 67 there should be a completely separate simple PAM authenticator binary. | |
| 68 - namespaces: add new "auto_disable" flag so if the mailbox can't be opened | |
| 69 (eg. file doesn't exist), just ignore the problem and disable the namespace | |
| 70 - auth master refcounting when handling user/request? | |
| 71 - PAM / checkpassword should use passdb-blocking | |
| 72 | |
| 73 - deleting lots of messages for rarely opened box seems to cause trouble: | |
| 74 IMAP(cras:17105): Cached message offset lost for seq 93 in mbox file /home/cras/mail/bugtraq | |
| 75 IMAP(cras:21802): mbox sync: UID inserted in the middle of mailbox /home/cras/mail/bugtraq (816584 > 816580) | |
| 76 IMAP(cras:21802): mbox sync: UID inserted in the middle of mailbox /home/cras/mail/bugtraq (816598 > 816580) | |
| 77 | |
| 78 - solaris sendfile is broken? | |
| 3048 | 79 |
| 80 mail-index-transaction.c: line 467 (mail_index_transaction_add_last): | |
| 81 assertion failed:(idx == size || data[idx].uid1 <= update.uid1) | |
| 82 | |
| 3087 | 83 - keywords: |
| 84 - add some limits to how many there can be | |
| 85 - don't return \* in PERMANENTFLAGS when we're full | |
| 86 - remove unused keywords? | |
| 2774 | 87 |
| 88 - caching | |
| 3904 | 89 - force bits should be used only for nonregistered fields |
| 90 - change envelope parsing not to use get_headers() so imap.envelope can | |
| 91 actually be cached without all the headers.. | |
| 92 - compression should drop fields with last_used < | |
| 93 (latest_mail_index_date - month) | |
| 94 - when parsing mbox or saving message, parse the mail through index-mail | |
| 95 so things gets saved into cache immediately | |
| 96 - we could try compressing same field values into a single | |
| 97 location in cache file. | |
| 98 - support caching all message headers. this could be useful when | |
| 99 indexes are in local disk but actual mails are accessed through NFS. | |
| 2774 | 100 |
| 3087 | 101 - mbox |
| 3904 | 102 - size.physical isn't cached, but should it even be? .. |
| 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 | |
| 110 - Quote "From ", unquote ">From " | |
| 2774 | 111 - COPY doesn't work to itself (lock assert crash) |
| 3904 | 112 - keep mbox lock for two extra seconds after sync (do we really need to?) |
| 2143 | 113 - move /var/mail/user to ~/mbox if ~/mbox exists.. supposedly this |
| 114 could be useful if /var/mail doesn't have quota, but ~/mail does. | |
| 115 now, what do we then do if we can move only some of the mails?.. | |
| 116 - if we can't create dotlock file for mbox, make sure it still can be | |
| 117 selected in read-only state | |
| 118 | |
| 3087 | 119 - maildir |
| 120 - if indexes exist but dovecot-uidlist doesn't, it's not tried to be | |
| 121 recreated | |
| 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 |
| 129 - optimize initial left_idx in mail_index_lookup_uid_range() | |
| 130 - if log file is lost, generate it from old and new index | |
| 3087 | 131 - transaction log: when replacing log with a same sequence, we remove it |
| 132 from log's file list, but we don't do anything to existing log views. | |
| 133 this can crash later in mail_transaction_log_view_set() because 'first' | |
| 134 is from log list, while we're comparing it into view->tail which it never | |
| 135 is. also overwriting it leaks memory.. | |
| 136 - read-only support for mailboxes where we don't have write-access | |
| 137 - when mailbox is deleted/renamed and someone else had it open, we get | |
| 138 stat() error messages in log file. | |
| 139 - sort: we could create alternative indexes for different sort conditions. | |
| 140 sort code itself already supports this optimization. | |
| 2143 | 141 |
| 3087 | 142 - lib-storage |
| 143 - index_removal_timeout gets leaked in some conditions. how? | |
| 144 - subscribe: IMAP(anonymous): open(anonymous/mail/.temp...) failed: Permission denied | |
| 145 - subscriptions file should contain namespace prefixes. at least optionally. | |
| 146 there's the subscriptions = yes setting now for namespaces.. do it so that | |
| 147 if prefix = "" has subscriptions, it contains prefixes. otherwise not. | |
| 4128 | 148 - for shared/public namespaces default to "no" |
| 3087 | 149 - should we allow following symlinks in mbox/maildirs? they are now. |
| 150 - if we implement shared mailboxes with shared indexes, never do that or | |
| 151 others could symlink your personal mailboxes and see the indexes | |
| 152 created for it which may contain envelope etc. data | |
| 153 - this allows circular mailbox hierarchies which should be prevented by | |
| 154 eg. allowing max. 20 hierarchies. | |
| 860 | 155 - limit folder hierarchy levels? user can now create eg. a/a/a/a/... |
| 156 and then start renaming them from end to beginning, which probably will | |
| 157 at some point start causing syscall failures which will fill up logs. | |
| 3087 | 158 |
| 159 - login | |
| 160 - Digest-MD5: support integrity protection, and maybe crypting. Do it | |
| 161 through login process like SSL is done? | |
| 162 - x login foo bar | |
| 163 x NO Authentication failed. | |
| 164 x login cras pass | |
| 165 * BYE Disconnected for inactivity. | |
| 166 ^ but it's not disconnecting! (buggy dovecot-auth not replying) | |
| 3744 | 167 probably because userdb lookup didn't reply, and fd was already sent |
| 168 for master.. should imap-login be handling it anymore?.. | |
| 3087 | 169 - imap-login: Authenticate PLAIN failed: Authentication failed: |
| 170 Authentication server isn't connected, try again later.. [127.0.0.1] | |
| 171 ^ NO Authentication failed. (should be Temporary login failure!) | |
| 172 - if auth process dies, login process should retry authentication if | |
| 173 possible. or if not, disconnect the client so it doesn't think the auth | |
| 174 failed. | |
| 175 - send client IP immediately after accept() to master process. make sure | |
| 176 master shows the IP if login dies unexpectedly. master should probably | |
| 177 also kill the login process if it doesn't kill itself soon enough.. or | |
| 178 maybe just log the IP immediately. | |
| 474 | 179 |
| 3087 | 180 - auth |
| 181 - support specifying hex/base64 encoding in password scheme. for example | |
| 182 {plain-md5.base64} | |
| 183 - auth protocol: make sure values can't have tabs/lfs | |
| 184 - auth cache: cache userdb data too. | |
| 185 - remove system_user and allow returning multiple gids instead. | |
| 186 - SIGHUP restarts auth processes .. but does it wait until they've finished | |
| 187 with all requests? no. | |
| 3541 | 188 - post-login-sql-command (userdb command doesn't do because of dovecot-lda) |
| 3087 | 189 - does dovecot-auth really break when it runs out of fds? |
| 190 - dovecot-auth should limit how fast authentication requests are allowed from | |
| 191 login processes. especially if there's one login/connection the speed | |
| 192 should be something like once/sec. also limit how fast to accept new | |
| 193 connections. | |
| 194 - support read-only logins. user could with alternative password get only | |
| 195 read-access to mails so mails could be read relatively safely with | |
| 196 untrusted computers. Maybe always send [ALERT] about the previous | |
| 197 read-only login time with IP? | |
| 526 | 198 |
| 3087 | 199 - master |
| 200 - pipe() failed: Too many open files - fine, but don't log it 1000 times | |
| 201 a second | |
| 202 - configurable syslog prefix | |
| 203 - SIGHUP rather shouldn't restart listening sockets if they didn't change.. | |
| 3450 | 204 - if there are duplicate settings, complain about it |
| 3087 | 205 |
| 206 - quota | |
| 207 - support Maildir++ quota | |
| 208 - if dovecot-uidlist can't be written, assume the new mails have UIDs | |
| 209 beginning from uidlist.next_uid. Whenever mails are expunged, overwrite | |
| 210 the next_uid field with the current highest next_uid. Whenever we have | |
| 211 assumed UIDs and uidlist gets updated, throw the client out with | |
| 212 "inconsist mailbox". | |
| 213 - make sure all syscalls check for ENOSPACE (and ENOACCESS while at it) | |
| 214 | |
| 215 - ssl | |
| 216 - add setting: ssl_options = bitmask. by default we enable all openssl | |
| 217 workarounds, this could be used to disable some of them | |
| 218 - gnutls support isn't working | |
| 965 | 219 |
| 3087 | 220 - search |
| 221 - message header search: we should ignore LWSP between two MIME blocks | |
| 1250 | 222 - message_body_search() could accept multiple search keywords so we |
| 223 wouldn't need to call it separately for each one (so we wouldn't need | |
| 224 to parse the message multiple times). | |
| 225 - message_body_search() could support NULL MessagePart and the searching | |
| 226 could be done while parsing the message. this would need changes to | |
| 227 message_parse() as well. | |
| 228 - could optionally support scanning inside file attachments and use | |
| 229 plugins to extract text out of them (word, excel, pdf, etc. etc.) | |
| 230 - use a trie index for fast text searching, like cyrus squat? | |
| 231 - Create our own extension: When searching with TEXT/BODY, return | |
| 232 the message text surrounding the keywords just like web search engines | |
| 233 do. like: SEARCH X-PRINT-MATCHES TEXT "hello" -> * SEARCH 1 "He said: | |
| 234 Hello world!" 2 "Hello, I'm ...". This would be especially useful with | |
| 235 the above attachment scanning. | |
| 0 | 236 |
| 3087 | 237 - lib-charset |
| 238 - utf8_toupper() is a must. and a bit difficult if we want to do it right. | |
| 239 - add support for other things than iconv() as well? we could reuse | |
| 240 the code from cyrus or courier | |
| 241 - cache iconvs? they'd probably be faster if we just reset the | |
| 242 conversion instead of opening new one every time. and there will likely | |
| 243 be only one or two charsets which are used for nearly all conversions. | |
| 244 | |
| 245 - general | |
| 246 - rfc2231 continuation support (useless?) | |
| 1553 | 247 - rfc2557 support for BODYSTRUCTURE, as specified by RFC3501 |
| 3541 | 248 - lmtp server - is it needed? |
| 1250 | 249 - create indexer binary |
| 3087 | 250 - ~/.dovecotrc to override system wide settings. namespace settings should |
| 251 override all the previous namespace settings instead of adding new. | |
| 252 - ESTALE handling for NFS safety | |
| 253 - option to disable SORT, SEARCH and other memory/cpu-intensive features. | |
| 254 defaults and per-user by dovecot-auth. | |
| 255 - dotlock overriding is racy, but it's pretty difficult to fix it. Also | |
| 256 overriding someone else's dotlock in shared folder isn't possible. These | |
| 257 could be fixed by having separate lock process running as root, which | |
| 258 would chown() the file for another uid and then unlink() it as that user. | |
| 259 One problem with that is that if malicious user sets setuid+execute bits | |
| 260 on for the file, he could run the file and get changed to the new uid. | |
| 261 That hopefully shouldn't matter much since the new uid should be user | |
| 262 with minimum possible privileges. Anyway, optional.. | |
| 263 - things break if next_uid gets to 2^32 | |
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264 |
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265 capabilities: |
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266 - preferrably all should be possible to #ifdef away by a configure |
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267 option (--without-capabilities=acl,namespace,...) |
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268 - possibility to disable them from config file |
| 3087 | 269 - THREAD=ORDEREDSUBJECT - although pretty useless I'd think. |
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270 - acl (rfc2086, draft-ietf-imapext-acl), namespace (rfc2342) |
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271 - probably do it like cyrus. "user.<username>" to access other |
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272 users, with "" defaulting to "user.<myself>". these should be |
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273 configurable however. |
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274 - shared namespaces? maybe configurable in config file |
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275 - easiest way to do ACL would be to use unix modes, but is that |
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276 useful at all? Well, ACL2 has a bit better support for that, so |
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277 maybe we could support it. |
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278 - otherwise gets a bit trickly, we could keep all mail in "imapmail" |
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279 group and 0600/0700 mode by default, but when mail is shared to others, |
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280 the group read/write access bits would be set. or alternatively we |
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281 could launch another imap process to handle it, which we should support |
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282 anyway. ACLs could be stored into ".acl" ascii file in each folder. |
| 480 | 283 - support for private and shared flags, configurable by mailbox admin. |
| 284 this isn't in any draft yet, but ACL2 author was going to create one. | |
| 285 [SHAREDFLAGS (...)] would specify which ones are shared, don't know yet | |
| 286 how they would be configured. | |
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287 - quota (rfc2087, draft-cridland-imap-quota) |
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288 - give filesystem values only to admins |
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289 - support for Maildir++, probably no need to support more. |
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290 quota capability supports complex quota configuration, but if |
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291 no mailer supports them we probably shouldn't bother either |
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292 - id (rfc2971) |
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293 - must be configurable what gets sent, default to only name=Dovecot |
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294 - separate pre/post-login settings |
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295 - optionally log configured parts of the client information, but only |
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296 once, probably at the same time as logging "Logged in", |
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297 "Disconnected", etc. |
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298 - remember to force truncating values longer than 30 chars, |
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299 especially before logging |
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300 - mailbox-referrals (rfc2193) |
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301 - this is useful whenever we would otherwise need to make the |
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302 connection ourself. for example load balancing and shared mailboxes |
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303 requiring another UID to run. |
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304 - this rfc defines no exact way for server to detect if client |
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305 supports referrals or not. I don't think there's much point in |
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306 supporting only referrals, as most clients don't support them. |
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307 Instead we should return referrals when we know that client |
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308 supports them, otherwise do the connecting ourself. If client |
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309 issues RLIST or RLSUB command, it's safe to assume it supports |
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310 referrals. |
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311 - for load balancing this works just fine, but what about shared |
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312 mailboxes which require different UID? If we login with our own |
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313 username, we end up with our own UID instead of what we wanted. |
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314 IMAP URLs don't support separated authorization id which would |
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315 have made this very easy.. We could give the "userid@group" as |
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316 userid, but clients probably treat it as different userid and |
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317 ask the password again. |
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318 - problems, problems, .. maybe not worth the trouble. |
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319 - drafts: |
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320 - http://www.imc.org/ids.html |
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321 - annotate (draft-ietf-imapext-annotate) |
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322 - per-message annotations. this will be major change. especially |
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323 because currently there's no suitable storage for them, and |
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324 they'll probably change all the time.. maybe if we moved into |
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325 berkeley db to store the .data file and these annotations. |
| 1178 | 326 - this is separate problem from index files. indexes are treated as |
| 327 temporary files, annotations are permanent data. we'd have to | |
| 328 support non-db way to do this too, which would probably be just a | |
| 329 simple (slow) text file. | |
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330 - annotatemore (draft-daboo-imap-annotatemore) |
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331 - server and per-mailbox annotations. much easier than |
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332 per-message annotations, but they'd be easier to place into |
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333 db as well. |
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334 - binary (draft-nerenberg-imap-binary) |
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335 - perhaps not too useful. I'd like to make Dovecot fully |
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336 binary-safe though. |
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337 - view (draft-ietf-imapext-view) |
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338 - slow, complex, luckily draft expired almost two years ago. |
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339 i hope i don't have to implement this :) |
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340 - can be done client-side just fine (evolution's virtual folders) |