Arbitron collects and reports readership statistics for mailboxes on the
server. It also optionally prunes the mailboxes of \Seen state for
Arbitron produces one line of output per mailbox, reporting the mailbox name
followed by a space, followed by the number of
readers (and if -u is specified, followed by a colon and a
comma-separated list of the readers userids), and if -o is not
specified, another space and the number of subscribers (and if -u is
specified, followed by a colon and a comma-separated list of the
IMPORTANT: This format is subject to change in future versions.
Each "reader" is a distinct authentication identity which has
"s" rights to the mailbox and which has SELECTed the mailbox within
either the past
days days or the specified date range.
Users are not counted as reading their own personal mailboxes.
Personal mailboxes are not reported unless there is at least one
reader other than the mailboxes owner.
Arbitron reads its configuration options out of the
file unless specified otherwise by -C.