The Cyrus IMAP (Internet Message Access Protocol) server provides access to
personal mail, system-wide bulletin boards, news-feeds, calendar and contacts
through the IMAP, JMAP, NNTP, CalDAV and CardDAV protocols. The Cyrus IMAP
server is a scalable enterprise groupware system designed for use from small to
large enterprise environments using technologies based on well-established Open
Standards.
A full Cyrus IMAP implementation allows a seamless mail and bulletin board
environment to be set up across one or more nodes. It differs from other IMAP
server implementations in that it is run on sealed nodes, where users are not
normally permitted to log in. The mailbox database is stored in parts of the
filesystem that are private to the Cyrus IMAP system. All user access to mail
is through software using the IMAP, IMAPS, JMAP, POP3, POP3S, KPOP, CalDAV
and/or CardDAV protocols.
The private mailbox database design gives the Cyrus IMAP server large
advantages in efficiency, scalability, and administrability. Multiple
concurrent read/write connections to the same mailbox are permitted. The server
supports access control lists on mailboxes and storage quotas on mailbox
hierarchies.
Provides
Requires
License
BSD-Attribution-HPND-disclaimer
Changelog
* Fri Sep 11 2026 Martin Osvald <mosvald@redhat.com> - 3.10.4-1
- New version 3.10.4 (rhbz#2500822)
* Sat Jan 17 2026 Martin Osvald <mosvald@redhat.com> - 3.10.2-1
- New version 3.10.2 (rhbz#2290535)
* Mon Nov 24 2025 Martin Osvald <mosvald@redhat.com> - 3.8.3-16
- Remove sscg option --package from cyrus-imapd-init.service (rhbz#2416688)
* Wed Aug 13 2025 František Hrdina <fhrdina@redhat.com> - 3.8.3-15
- Update of fmf plans
* Wed Aug 06 2025 František Zatloukal <fzatlouk@redhat.com> - 3.8.3-14
- Rebuilt for icu 77.1
* Wed Jul 23 2025 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.3-13
- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
* Tue Jul 08 2025 Jitka Plesnikova <jplesnik@redhat.com> - 3.8.3-12
- Perl 5.42 rebuild
* Tue Feb 11 2025 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 3.8.3-11
- Drop call to %sysusers_create_compat
* Tue Jan 28 2025 Joe Orton <jorton@redhat.com> - 3.8.3-10
- enable the idled daemon in the default cyrus.conf
* Mon Jan 27 2025 Nikita Sanjay Patwa <npatwa@redhat.com> - 3.8.3-9
- Corrected the declaration and defination of patch_doc_t and find_cb
* Thu Jan 16 2025 Fedora Release Engineering <releng@fedoraproject.org> - 3.8.3-8
- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
* Sun Dec 08 2024 Pete Walter <pwalter@fedoraproject.org> - 3.8.3-7
- Rebuild for ICU 76
* Fri Oct 25 2024 Orion Poplawski <orion@nwra.com> - 3.8.3-6
- Rebuild for clamav 1.4.1
* Tue Oct 22 2024 Richard W.M. Jones <rjones@redhat.com> - 3.8.3-5
- Rebuild for Jansson 2.14 (https://lists.fedoraproject.org/archives/list/d
evel@lists.fedoraproject.org/thread/3PYINSQGKQ4BB25NQUI2A2UCGGLAG5ND/)
Files
/etc/cron.daily/cyrus-imapd
/etc/cyrus.conf
/etc/imapd.conf
/etc/logrotate.d/cyrus-imapd
/etc/pam.d/csync
/etc/pam.d/http
/etc/pam.d/imap
/etc/pam.d/lmtp
/etc/pam.d/mupdate
/etc/pam.d/nntp
/etc/pam.d/pop
/etc/pam.d/sieve
/etc/pki/cyrus-imapd
/etc/pki/cyrus-imapd/cyrus-imapd-ca.pem
/etc/pki/cyrus-imapd/cyrus-imapd-key.pem
/etc/pki/cyrus-imapd/cyrus-imapd.pem
/etc/sysconfig/cyrus-imapd
/run/cyrus
/run/cyrus/db
/run/cyrus/lock
/run/cyrus/proc
/run/cyrus/socket
/usr/bin/arbitron
/usr/bin/chk_cyrus
/usr/bin/ctl_backups
/usr/bin/ctl_conversationsdb
/usr/bin/ctl_cyrusdb
/usr/bin/ctl_deliver
/usr/bin/ctl_mboxlist
/usr/bin/ctl_zoneinfo
/usr/bin/cvt_cyrusdb
/usr/bin/cvt_xlist_specialuse
/usr/bin/cyr_backup
/usr/bin/cyr_buildinfo
/usr/bin/cyr_cd.sh
/usr/bin/cyr_dbtool
/usr/bin/cyr_deny
/usr/bin/cyr_df
/usr/bin/cyr_expire
/usr/bin/cyr_fetchnews
/usr/bin/cyr_info
/usr/bin/cyr_ls
/usr/bin/cyr_pwd
/usr/bin/cyr_quota
/usr/bin/cyr_restore
/usr/bin/cyr_synclog
/usr/bin/cyr_userseen
/usr/bin/cyrdump
/usr/bin/dav_reconstruct
/usr/bin/deliver
/usr/bin/ipurge
/usr/bin/mbexamine
/usr/bin/mbpath
/usr/bin/mbtool
/usr/bin/ptdump
/usr/bin/ptexpire
/usr/bin/reconstruct
/usr/bin/relocate_by_id
/usr/bin/sievec
/usr/bin/sieved
/usr/bin/squatter
/usr/bin/sync_client
/usr/bin/sync_reset
/usr/bin/tls_prune
/usr/bin/unexpunge
/usr/lib/.build-id
/usr/lib/.build-id/00
/usr/lib/.build-id/00/1d5f4e080d7a6e17cd6aac63903e57037294ac
/usr/lib/.build-id/00/cd6692b06b0677f523dfc74a0e3512f55f78dc
/usr/lib/.build-id/01
/usr/lib/.build-id/01/6dacfc5f648e9b7143b95915f38d56330b61e2
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/usr/lib/.build-id/0a
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/usr/lib/.build-id/0c
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/usr/lib/.build-id/0e
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/usr/lib/.build-id/13/1e4f8e1ae2a4c7e81296efb83e5529ea412f10
/usr/lib/.build-id/15
/usr/lib/.build-id/15/94e75c8b95c3a95cfe4acf3228cdcf3ccc3317
/usr/lib/.build-id/1c
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/usr/lib/.build-id/1f/5e538e5feee304e4a5ea68753826c1e66259c1
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/usr/lib/.build-id/24/cd857632559c0dd9e3e6f105ae44c54a710f2d
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/usr/lib/.build-id/c1/7ac9f9ba4424bf05adef7d559a1be286b4dd6a
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/usr/lib/.build-id/ca/297c2a112834bf9d86b8c95fdfbe6e995ba6a4
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/usr/lib/.build-id/fe
/usr/lib/.build-id/fe/30871f9d0373adc85f17dbbfdf4fb8b8978a0b
/usr/lib/cyrus-imapd
/usr/lib/cyrus-imapd/deliver
/usr/lib/systemd/system/cyrus-imapd-init.service
/usr/lib/systemd/system/cyrus-imapd.service
/usr/lib/sysusers.d/cyrus-imapd.conf
/usr/lib/tmpfiles.d/cyrus-imapd.conf
/usr/libexec/cyrus-imapd
/usr/libexec/cyrus-imapd/arbitronsort.pl
/usr/libexec/cyrus-imapd/backupd
/usr/libexec/cyrus-imapd/calalarmd
/usr/libexec/cyrus-imapd/fud
/usr/libexec/cyrus-imapd/httpd
/usr/libexec/cyrus-imapd/idled
/usr/libexec/cyrus-imapd/imapd
/usr/libexec/cyrus-imapd/lmtpd
/usr/libexec/cyrus-imapd/lmtpproxyd
/usr/libexec/cyrus-imapd/masssievec
/usr/libexec/cyrus-imapd/master
/usr/libexec/cyrus-imapd/mki