iRedMail uses maildir
mailbox format by default, it's easy to migrate and
maintain, but if mailbox size is growing, the performance will be getting
slower due to too much disk I/O. Dovecot's own mailbox format mdbox
has very
good performance for large mailbox due to reduced disk I/O.
You may want to switch to other mailbox format for some reason. To help you switch easily, iRedMail-0.9.9 introduces 2 new SQL columns (for SQL backends) and LDAP attributes (for LDAP backends) to help you switch per-user mailbox format easily. All [mailbox formats supported by Dovecot]https://wiki2.dovecot.org/MailboxFormat) is supported in iRedMail.
Attention
mailboxFormat
).Warning
You can switch to different mailbox format with SQL commands below. We use MySQL for example here.
USE vmail;
UPDATE mailbox SET mailboxformat='mdbox', mailboxfolder='mdbox' where username="user@your-domain.com";
mailboxfolder
can be any folder name supported by Linux/BSD file
system, but value of mailboxformat
must be one of the formats supported by
Dovecot, e.g. maildir, sdbox, mdbox.mailboxfolder
can not be same as previously used one, otherwise
old mailbox will be messed up when Dovecot delivers new email.You need some LDAP management tool like phpLDAPadmin,
Apache Directory Studio, or command
line tool ldapvi
(you can install it with yum
or apt-get
command directly)
to update mail user's LDIF data.
mailboxFormat: mdbox
mailboxFolder: mdbox
mailboxFolder
can be any folder name supported by Linux/BSD file
system, but value of mailboxFormat
must be one of the formats supported by
Dovecot, e.g. maildir, sdbox, mdbox.mailboxfolder
can not be same as previously used one, otherwise
old mailbox will be messed up when Dovecot delivers new email.mailboxFormat
and mailboxFolder
don't
present in user LDAP object, Dovecot is configured to use maildir
as
default mailbox format and Maildir
(case-sensitive) as folder name.