Hi,
Suddenly I have a strange problem with the latest Outlook 365 (version 2506,
build 16.0.1.18925.20076 64-bit) clients. When a user flags a message, they
cannot remove the flag because Outlook gives an error message "The action
cannot be performed because the message has been modified". One solution is to
make the message unread and then remove the flag.
However, since the moment a user flags a message for the first time, the
maillog contains delete/expunge loop endlessly, for example:
Jul 18 09:50:25 server dovecot: imap(user): delete: box=INBOX.Euro Brand,
uid=2108,
msgid=<gv1p195mb16414fac3d4bac6326f9560483...@gv1p195mb1641.eurp195.prod.outlook.com>,
size=7597602, vsize=7698181, from="Masked User" <masked.u...@somedomain.com>,
subject=testing
Jul 18 09:50:25 server dovecot: imap(user): expunge: box=INBOX.Euro Brand,
uid=2108,
msgid=<gv1p195mb16414fac3d4bac6326f9560483...@gv1p195mb1641.eurp195.prod.outlook.com>,
size=7597602, vsize=7698181, from="Masked User" <masked.u...@somedomain.com>,
subject=testing
Jul 18 09:50:27 server dovecot: imap(user): delete: box=INBOX.Euro Brand,
uid=2109,
msgid=<gv1p195mb16414fac3d4bac6326f9560483...@gv1p195mb1641.eurp195.prod.outlook.com>,
size=7597628, vsize=7698214, from="Masked User" <masked.u...@somedomain.com>,
subject=testing
Jul 18 09:50:27 server dovecot: imap(user): expunge: box=INBOX.Euro Brand,
uid=2109,
msgid=<gv1p195mb16414fac3d4bac6326f9560483...@gv1p195mb1641.eurp195.prod.outlook.com>,
size=7597628, vsize=7698214, from="Masked User" <masked.u...@somedomain.com>,
subject=testing
Jul 18 09:50:28 server dovecot: imap(user): delete: box=INBOX.Euro Brand,
uid=2110,
msgid=<gv1p195mb16414fac3d4bac6326f9560483...@gv1p195mb1641.eurp195.prod.outlook.com>,
size=7597654, vsize=7698247, from="Masked User" <masked.u...@somedomain.com>,
subject=testing
Jul 18 09:50:28 server dovecot: imap(user): expunge: box=INBOX.Euro Brand,
uid=2110,
msgid=<gv1p195mb16414fac3d4bac6326f9560483...@gv1p195mb1641.eurp195.prod.outlook.com>,
size=7597654, vsize=7698247, from="Masked User" <masked.u...@somedomain.com>,
subject=testing
...
So the message UID will change indefinitely forever.
Is there any way to fix this with dovecot configuration?
###
dovecot -n
# 2.3.21.1 (d492236fa0): /etc/dovecot/dovecot.conf
auth_cache_size = 1 k
auth_failure_delay = 1 mins
auth_mechanisms = plain login
base_dir = /var/run/dovecot/
default_client_limit = 2000
default_process_limit = 500
disable_plaintext_auth = no
dsync_features = no-header-hashes
import_environment = TZ CORE_OUTOFMEM CORE_ERROR TZ=:/etc/localtime
MALLOC_MMAP_THRESHOLD_=131072
listen = *
login_greeting =
login_log_format_elements = %u %r %m %c %k
mail_location = maildir:~/Maildir
mail_log_prefix = "%s(%u): "
mail_plugins = " mail_log notify"
mail_sort_max_read_count = 100
mailbox_list_index_very_dirty_syncs = yes
maildir_very_dirty_syncs = yes
passdb {
args = dovecot
driver = pam
}
plugin {
autocreate2 = Sent Items
autosubscribe2 = Sent Items
mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
mail_log_fields = uid box msgid size from subject vsize
}
protocols = imap
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix
mode = 0666
user = postfix
}
}
service imap-login {
inet_listener imap {
port = 0
}
inet_listener imaps {
port = 993
ssl = yes
}
process_min_avail = 1
}
service imap {
process_limit = 2048
vsz_limit = 1 G
}
ssl_ca = </etc/ssl/certs/mail.ca.crt
ssl_cert = </etc/ssl/certs/mail.fullchain.cer
ssl_cipher_list =
kEECDH:+kEECDH+SHA:kEDH:+kEDH+SHA:+kEDH+CAMELLIA:kECDH:+kECDH+SHA:kRSA:+kRSA+SHA:+kRSA+CAMELLIA:!aNULL:!eNULL:!SSLv2:!RC4:!MD5:!DES:!EXP:!SEED:!IDEA:!3DES
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
ssl_min_protocol = TLSv1
ssl_prefer_server_ciphers = yes
state_dir = /var/run/dovecot
userdb {
driver = passwd
}
protocol imap {
imap_client_workarounds = tb-extra-mailbox-sep tb-lsub-flags delay-newmail
imap_idle_notify_interval = 15 mins
imap_logout_format = %{rip}, bytes=%i/%o, del=%{deleted}
mail_max_userip_connections = 500
}
--
Mart
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