# SYNC_SERVER

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
FILES
SEE ALSO
AUTHOR
COPYRIGHT

## NAME

sync_server - Cyrus IMAP documentation

Server side of the synchronization (replication) engine

## SYNOPSIS

sync_server `[` -C config-file `] [` -p ssf`]`

## DESCRIPTION

`sync_server` is the server side of the replication system. It runs on the target (replica) system and listens for connections from sync_client(8) which provides instructions for synchronizing the replica system with the master system.

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

## OPTIONS

-C config-file

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

| -p ssf |  | Tell sync_server that an external layer exists. An SSF (security strength factor) of 1 means an integrity protection layer exists. Any higher SSF implies some form of privacy protection.

## EXAMPLES

sync_server is commonly included in the SERVICES section of cyrus.conf(5) like so:

    SERVICES {
        imap        cmd="imapd -U 30" listen="imap" prefork=0
        imaps       cmd="imapd -s -U 30" listen="imaps" prefork=0 maxchild=100
        pop3        cmd="pop3d -U 30" listen="pop3" prefork=0
        pop3s       cmd="pop3d -s -U 30" listen="pop3s" prefork=0 maxchild=100
        lmtpunix    cmd="lmtpd" listen="/var/run/cyrus/socket/lmtp" prefork=0 maxchild=20
        sieve       cmd="timsieved" listen="sieve" prefork=0
        notify      cmd="notifyd" listen="/var/run/cyrus/socket/notify" proto="udp" prefork=1
        httpd       cmd="httpd" listen=8080 prefork=1 maxchild=20
        syncserver  cmd="sync_server" listen="csync"
    }

## FILES

/etc/imapd.conf, /etc/cyrus.conf

## SEE ALSO

sync_client(8), imapd.conf(5), cyrus.conf(5)

## AUTHOR

The Cyrus Team, David Carter (dpc22@cam.ac.uk), Ken Murchison (ken@oceana.com), Nic Bernstein (Onlight)

## COPYRIGHT

1993â2025, The Cyrus Team