[Dovecot] dovecot with maildir not using mtime on reindex

[Richard Platel]

Hi.

It seems that dovecot is using the current time, not a maildir file's mtime for INTERNALDATE when a message is re-indexed:

$ cd Index
$ rm -rf .INBOX
$ cd ../Maildir/cur
$ stat *
  File: `1392914632.P54451Q0M08633.smtpin01,S=2215,W=2249:2,'
  Size: 960             Blocks: 8          IO Block: 1048576 regular file
Device: 36h/54d Inode: 11132959    Links: 1
Access: (0600/-rw-------)  Uid: (    8/    mail)   Gid: (    8/    mail)
Access: 2012-01-01 00:00:00.000000000 +0000
Modify: 2012-01-01 00:00:00.000000000 +0000
Change: 2014-02-20 16:46:20.000000000 +0000
 Birth: -
$ telnet imap01 143
Trying 10.5.45.1...
Connected to imap01.dev.firefly.tucows.com.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN] Dovecot ready.
A LOGIN rplatel at ff-dev.com ********
A OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE BINARY MOVE QUOTA] Logged in
A SELECT INBOX
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft \*)] Flags permitted.
* 1 EXISTS
* 0 RECENT
* OK [UNSEEN 1] First unseen.
* OK [UIDVALIDITY 1265835133] UIDs valid
* OK [UIDNEXT 4548] Predicted next UID
A OK [READ-WRITE] Select completed (0.035 secs).
A FETCH 1:* FULL
* 1 FETCH (FLAGS () INTERNALDATE "20-Feb-2014 16:59:51 +0000" RFC822.SIZE 2249 ENVELOPE ("Thu, 20 Feb 2014 11:43:50 -0500" "Test message" (("Richard Platel" NIL "rplatel" "tucows.com")) (("Richard Platel" NIL "rplatel" "tucows.com")) (("Richard Platel" NIL "rplatel" "tucows.com")) ((NIL NIL "rplatel" "ff-dev.com")) NIL NIL NIL "<BED6EB46-CC88-4BDB-AE8B-98C1CDEAD67C at tucows.com>") BODY ("text" "plain" ("charset" "us-ascii") NIL NIL "7bit" 23 4))
A OK Fetch completed.
A LOGOUT
* BYE Logging out
A OK Logout completed.
Connection closed by foreign host.
$ date
Thu Feb 20 16:59:58 UTC 2014

Stracing the imap process, it seems dovecot does not stat the message file at all.  Performing the above with an old dovecot 1 server yields the expected result, the INTERNALDATE of the message is the file's mtime.

$ dovecot -n -c /he/dovecot/conf/dovecot.conf
# 2.2.10.3: /he/dovecot/conf/dovecot.conf
# OS: Linux 3.4.46-dom0-2.0.0 x86_64 Debian 7.0
debug_log_path = syslog
disable_plaintext_auth = no
first_valid_uid = 8
info_log_path = syslog
lock_method = dotlock
log_timestamp =
mail_fsync = always
mail_gid = mail
mail_nfs_index = yes
mail_nfs_storage = yes
mail_plugins = zlib quota tc_mail_log notify tc_proc
mail_temp_dir = /var/run/dovecot_tmp
mail_uid = mail
maildir_very_dirty_syncs = yes
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
mmap_disable = yes
namespace inbox {
  inbox = yes
  location =
  prefix =
}
passdb {
  args = host=localhost port=1143 username=%L{user}::%L{service}::%L{rip}::%L{session}
  driver = imap
}
plugin {
  antispam_backend = pipe
  antispam_debug_target = syslog
  antispam_pipe_program = /he/dovecot/utils/he_spamtrain.pl
  antispam_pipe_program_args = --user=%u
  antispam_pipe_program_notspam_arg = --falsepositive
  antispam_pipe_program_spam_arg = --missed
  antispam_pipe_tmpdir = /var/run/dovecot_as_tmp
  antispam_signature_missing = move
  antispam_spam = Spam;Inbox.Spam;INBOX.Spam;Junk;INBOX.Junk
  antispam_trash_pattern_ignorecase = trash
  mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename flag_change append
  mail_log_fields = uid box msgid flags hetag
  memcached_servers = 10.5.47.223,10.5.47.222
  zlib_save = gz
  zlib_save_level = 6
}
protocols = imap pop3
service anvil {
  unix_listener anvil-auth-penalty {
    mode = 00
  }
}
service imap-login {
  inet_listener imap {
    address = 0
  }
  inet_listener imaps {
    port = 0
  }
  process_limit = 29
  process_min_avail = 14
  service_count = 0
}
service imap-postlogin {
  executable = script-login -d /he/dovecot/utils/post_login.sh
}
service imap {
  executable = imap imap-postlogin
  process_limit = 1270
  vsz_limit = 0
}
service pop3-login {
  inet_listener pop3 {
    address = 0
  }
  inet_listener pop3s {
    port = 0
  }
  process_limit = 29
  process_min_avail = 14
  service_count = 0
}
service pop3-postlogin {
  executable = script-login -d /he/dovecot/utils/post_login.sh
}
service pop3 {
  executable = pop3 pop3-postlogin
  process_limit = 206
  vsz_limit = 512 M
}
ssl = no
userdb {
  args = /he/dovecot/conf/dovecot-tc-dict-auth.conf
  driver = dict
}
verbose_proctitle = yes
protocol imap {
  mail_max_userip_connections = 30
  mail_plugins = zlib quota tc_mail_log notify tc_proc imap_quota antispam
}
protocol pop3 {
  mail_max_userip_connections = 30
  pop3_uidl_format = %08Xv%08Xu
}