Users cannot access to their imap-folders

Tue Apr 11 01:21:01 EDT 2017

What is Cyrus syslogging?

On Tue, 11 Apr 2017, at 15:16, Anton Shilov via Info-cyrus wrote:

> Users cannot access to their imap-folders.

> Sometimes (once or twice a week) users complains that they cannot
> connect to their mailboxes and read emails. At the same time I see
> such records in maillog:
> "Apr 10 15:01:01 mailserv postfix/lmtp[22843]: D64651001D37:
> to=<user at mailserv.example.com[1]>, orig_to=<user at example.com[2]>,
> relay=mailserv.example.com[/var/lib/imap/socket/lmtp], delay=300,
> delays=0.13/0/0/300, dsn=4.4.2, status=deferred (conversation with
> mailserv.example.com[/var/lib/imap/socket/lmtp] timed out while
> sending MAIL FROM)». It means mail queue increases
> Also I find out lots of "PID-files" in /dev/shm/cyrus-imapd/proc which
> don't contain info of linked imap-folder. For example: "pc-
> user.example.com [192.168.0.11] user"
> It's unhealthy situation and I don't understannd what reason is. In
> order to help users I just kill their IMAP-process and make
> reconstruct mailbox. Please help me with investigation of the
> problems.
> My setup is:
> --------------------------------------------

> Static hostname: mailserv Icon name: computer-vm Chassis: vm Machine
> ID: cbb779ad0b103a10ec75c10c452e0f71 Boot ID:
> c31a27599dc84971902e6c70dca26c18 Virtualization: kvm Operating System:
> CentOS Linux 7 (Core) CPE OS Name: cpe:/o:centos:centos:7 Kernel:
> Linux 3.10.0-514.6.1.el7.x86_64 Architecture: x86-64
> --------------------------------------------
> name : Cyrus IMAPD version : v2.4.17-Fedora-RPM-2.4.17-8.el7_1
> d1df8aff 2012-12-01 vendor : Project Cyrus support-url:
> http://www.cyrusimap.org[3] os : Linux os-version : 3.10.0-
> 514.6.1.el7.x86_64 environment: Built w/Cyrus SASL 2.1.26 Running
> w/Cyrus SASL 2.1.26 Built w/Berkeley DB 5.3.21: (May 11, 2012) Running
> w/Berkeley DB 5.3.21: (May 11, 2012) Built w/OpenSSL 1.0.1e-fips 11
> Feb 2013 Running w/OpenSSL 1.0.1e-fips 11 Feb 2013 Built w/zlib 1.2.7
> Running w/zlib 1.2.7 CMU Sieve 2.4 TCP Wrappers NET-SNMP mmap = shared
> lock = fcntl nonblock = fcntl idle = idled
> Server Wide: freespace: 1820105352
> ------------------------------------
> imapd.conf
> ------------------------------------
> debug: no commandmintimer: 2 configdirectory: /var/lib/imap partition-
> default: /var/spool/mail proc_path: /dev/shm/cyrus-imapd/proc
> mboxname_lockpath: /dev/shm/cyrus-imapd/mboxname_lock
> duplicate_db_path: /dev/shm/cyrus-imapd/duplicate_db
> statuscache_db_path: /dev/shm/cyrus-imapd/statuscache_db
> allowplaintext: yes allowallsubscribe: yes allowusermoves: yes
> imapidlepoll: 10 idlemethod: idled imapidresponse: yes admins: cyrus
> lmtp_admins: cyrus singleinstancestore: yes duplicatesuppression: yes
> reject8bit: no pass8bit: yes munge8bit: no lmtp_downcase_rcpt: no
> sieveusehomedir: false sievedir: /var/lib/imap/sieve duplicate_db:
> skiplist mboxlist_db: skiplist postmaster: postmaster postuser: shared
> lmtp_over_quota_perm_failure: yes lmtp_strict_quota: yes quotawarn: 98
> sendmail: /usr/sbin/sendmail hashimapspool: 0 sasl_pwcheck_method:
> saslauthd sasl_mech_list: PLAIN LOGIN tls_cert_file:
> /var/lib/imap/SSL.crt tls_key_file: /var/lib/imap/SSL.key tls_ca_file:
> /var/lib/imap/CA_SSL.crt tls_ca_path: /var/lib/imap tcp_keepalive: yes
> tcp_keepalive_cnt: 3 tcp_keepalive_intvl: 10 tcp_keepalive_idle: 180
> temp_path: /tmp telemetry_bysessionid: yes timeout: 40
> imapidletimeout: 0 expunge_mode: delayed expunge_days: 30
> deletedprefix: DELETED delete_mode: immediate flushseenstate: 1
> -------------------------------------------
> cyrus.conf
> -------------------------------------------
> START { recover<----->cmd="ctl_cyrusdb -r"
> idled><------>cmd="idled"
> }
> SERVICES { imap cmd="imapd" listen="imap" proto=tcp4 prefork=5 imaps
> cmd="imapd -s" listen="imaps" proto=tcp4 prefork=10 pop3 cmd="pop3d"
> listen="pop3" proto=tcp4 prefork=3 pop3s cmd="pop3d -s" listen="pop3s"
> proto=tcp4 prefork=3 sieve cmd="timsieved" listen="sieve" proto=tcp4
> prefork=0 lmtpunix<---->cmd="lmtpd" listen="/var/lib/imap/socket/lmtp"
> prefork=1 .. }
> EVENTS { checkpoint<-->cmd="ctl_cyrusdb -c" period=30 delprune<----
> >cmd="cyr_expire -E 3" at=0400 tlsprune<---->cmd="tls_prune" at=0400
> squatter cmd="squatter -i" at=0600
> }

> 

> --------

> Best regards, Anton

> 2017-Apr-11

> 

> 

> ----

> Cyrus Home Page: http://www.cyrusimap.org/

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--

  Bron Gondwana

  brong at fastmail.fm

Links:

  1. https://e.mail.ru/compose?To=user@mailserv.example.com
  2. https://e.mail.ru/compose?To=user@example.com
  3. http://www.cyrusimap.org/
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