mountcommands can be used to manage the list of mountpoints where mails are stored.
This is used mainly for better error handling when a mountpoint isn t
mounted for some reason:
If a mail directory doesn t exist, it s autocreated.
If the user s mails aren t mounted and filesystem permissions still
allow the autocreation, the user will see an empty mailbox and later will
have to redownload all mails.
If the mountpoint is known to be unmounted, Dovecot will simply fail
opening any mailboxes.
If dbox alternate storage isn t mounted and a mail in it is attempted to
be accessed, Dovecot normally rebuilds the indexes and notices that all the
mails in alt storage are expunged.
When the alt storage is mounted back and even if index is again rebuilt,
the mails won t necessarily become visible anymore for IMAP clients.
If the mountpoint is known to be unmounted, Dovecot won t rebuild
indexes and lose the mails.
Dovecot automatically adds mountpoints to this list at startup.
If you don t want some of the mountpoints added, you can add a wildcard
ignore for it.
If this command is run without any parameters, doveadm detects all missing
mountpoints and adds them (the same way as when Dovecot does at startup).
When a mountpoint
path is given, it s added as a mountpoint.
state can currently be either
online (default) or
ignore. The ignore state is mainly useful with path wildcards to add mountpoints
that you never want Dovecot to automatically add, such as:
doveadm mount add /mnt/* ignore