The second argument to deliverquota is optional. If present, quota specifies a new quota setting for this maildir. Specifying quota is equivalent to running m[blue]maildirmake(1)m[][2] with the -q option. The second argument to deliverquota is considered obsolete, and may be removed in the future.

deliverquota reads the message from standard input and delivers it to maildir. maildir may specify a path directly to a maildir folder, not the main maildir (as long as the folder was created by the m[blue]maildirmake(1)m[][2] command.

The -c option automatically creates the maildir, and all missing parent subdirectories (as 'mkdir -p'). This option should be used with caution.

The -w N option places a warning message into the maildir if the maildir has a quota setting, and after the message was successfully delivered the maildir was at least N percent full. The warning message is copied from the file specified by the -W option, or from /etc/quotawarnmsg if -W was not specified. The "Date:" and "Message-Id:" headers are added to the message. The warning is repeated every 24 hours (at least), until the maildir drops below N percent full.