Multiple partitions may be used for various reasons, such as to distribute load between different storage pools or technologies. Please consult Mail Spool Partitions for more details and use cases.
To define additional mail spools, add more partition-name
entries
to imapd.conf(5) as needed. For example, let’s imagine we
want to migrate users to new partitions split by first character of the
user’s last name, and add a partition for shared mailboxes (see
Shared Namespaces):
Sample:
defaultpartition: main partition-main: /var/spool/imap partition-am: /var/spool/imap-am partition-nz: /var/spool/imap-nz partition-shared: /var/spool/imap-shared