incr-with-hardlink.maildir

##
## This is an example maildir configuration file.
##
## The maildir handler slowly creates a backup of each user's
## mail file to a remote server. It is designed to be run with
## low overhead in terms of CPU and bandwidth, so it runs pretty
## slow. Hardlinking is used to save storage space. The actual
## mail file is stored within each snapshot directory.
##
## The basic algorithm is to rsync each mail file individually,
## and to use hard links for retaining historical data.
##
## We handle each mail file individually because it becomes very
## unweldy to hardlink and rsync many hundreds of thousands
## of files at once. It is much faster to take on smaller
## chunks at a time.
##
## Any mail file which is deleted from the source will be moved to
## "deleted" directory in the destination. It is up to you to
## periodically remove this directory or old maildirs in it.
##
## Note: This handler assumes that the remote shell is set to bash
##
## The defaults are useful in most cases, just make sure
## to configure the source and destination information

when = everyday at 23:00

## each users maildir will contain these files:
## daily.1, daily.2, daily.3, daily.4, daily.5, weekly.1, weekly.2,
## weekly.3, monthly.1
## if keepdaily is 5, keepweekly is 3, and keepmonthly is 1
keepdaily = 5
keepweekly = 3
keepmonthly = 1

# directory which contains all the maildirs
srcdir = /var/mail

# the srcdir is expected to contain the following subdirectories. Each
# of these will contain the user's Maildirs which start with these
# letters
srcsubdirs = 0 1 2 3 4 5 6 7 8 9 a b c d e f g h i j k l m n o p q r s t u v w x y z

# put the backups under this directory
destdir = /backup/maildir
desthost = dev1

# For the backup rotation to work, destuser must be able to run
# arbitrary bash commands on the desthost.
destuser = root

# For alternate ports from the default 22, specify here
# destport = 4444

# If you need to specify an alternate ssh public key authentication file
# do that here. Default: /root/.ssh/id_rsa
# destid_file = /home/backupkeys/.ssh/maildirbackup_id_rsa

# If you need to specify other ssh configuration options, do that here
# sshoptions = "-C -6"

# remove any maildirs from backup which might have been deleted
remove = yes

# use a ssh-mux to reuse connections, see the following article
# http://www.debian-administration.org/articles/290 for an example
#multiconnection = notset