Scroll to navigation



cyr_virusscan - Cyrus IMAP documentation

Scan for viruses using configured virus scanner or manage infected messages using search criteria.


cyr_virusscan [ -C config-file ] [ -s imap-search-string ] [ -r [ -n] ] [-v] [ mboxpattern1 ... ]


cyr_virusscan can be used to invoke an external virus scanner (currently only ClamAV is supported) to scan specified IMAP mailboxes. If no mboxpattern is given, cyr_virusscan works on all mailboxes.

Alternately, with the -s option, the IMAP SEARCH string will be used as a specification of messages which are assumed to be infected, and will be treated as such. The virus scanner is not invoked. Useful for removing messages without a distinct signature, such as Phish.

A table of infected messages will be output.

To remove infected messages, use the -r flag. Infected messages will be expunged from the user's mailbox.

With the notify flag, -n, notifications will be appended to the inbox of the mailbox owner, containing message digest information for the affected mail. This flag is only works in combination with -r.

cyr_virusscan can be configured to run periodically by cron(8) via crontab(5) or your preferred method (i.e. /etc/cron.hourly), or by master(8) via the EVENTS{} section in cyrus.conf(5).

cyr_virusscan reads its configuration options out of the imapd.conf(5) file unless specified otherwise by -C.

Note that Cyrus does not ship with any virus scanners: you need to install one separately to make use of it with Cyrus.


-C config-file
Use the specified configuration file config-file rather than the default imapd.conf(5).

Notify mailbox owner of deleted messages via email. This flag is only operable in combination with -r.

Remove infected messages.

-s imap-search-string
Rather than scanning for viruses, messages matching the search criteria will be treated as infected.

Produce more verbose output


Scan all mailboxes, printing report on the screen. Do not remove infected messages.

cyr_virusscan -r -n user/bovik
Scan mailbox user/bovik, removing infected messages and append notifications to bovik's inbox.

cyr_virusscan -r -n -s 'SUBJECT "Fedex"' user/bovik
Search mailbox user/bovik for messages which have Fedex in the subject line, removing them all, and appending notifications to Bovik's inbox.


Virus scan support was first introduced in Cyrus version 3.0.




imapd.conf(5), master(8), ClamAV


The Cyrus Team, Nic Bernstein (Onlight)


1993-2017, The Cyrus Team
August 10, 2018 3.0.8