VPOPMAIL AND MAILDIRQUOTAS                               (updated 16/Jan/2004)* OVERVIEW    As of version 5.1.1, vpopmail's quota system was changed to support the     Maildir++ specification used by the Courier Mail Server and its standalone     components (SqWebmail, Courier-IMAP, maildrop).  The Maildir++     specification accounts for mail not only in the user's Maildir/new and     Maildir/cur directories, but in maildirfolders as well.  This is good news     for people who use vpopmail along with any of the agents mentioned above,     as ALL messages should be accounted for.    See http://inter7.com/courierimap/README.maildirquota.html for details on     the Maildir++ specification, maildirquotas, and maildirfolders.    This was accomplished by integrating a lot of functions from vdeliverquota,    a tool shipped with courier-imap (among others) to allow non-Maildir++     delivery agents to utilize maildirquotas.* BACKWARDS COMPATIBLE   The new system is completely backwards compatible with your existing quota   settings.  The main difference you will see is that current usage    information is now stored in Maildir/maildirsize rather than   Maildir/.current_size.* CONFIGURATION    QUOTAS    Quota settings are still stored in vpopmail's authentication module. Just    set them as you have in the past with vmoduser -q or vsetuserquota.  But two    different formats are now supported:        Old vpopmail style: 1000000 or 1MB or 1000KB     (1MB quota)    maildirquota style: 1000000S or 1000000S,1000C     (1MB quota, or 1MB Quota / 1000 Message Count limit, whichever comes first)    While both styles will work with 5.1.1 and above, the maildirquota      style will ONLY work with 5.1.1 and above.  If you should downgrade your    vpopmail installation to a version below 5.1.1, you'll need to make sure    your quota settings are in the Old vpopmail style.    QUOTA WARN MESSAGES    You can have a quota warning delivered to a user when their message is     delivered successfully, but they are now over 90 percent utilisation.  Just    edit quotawarn.msg and copy it to ~vpopmail/domains/.quotawarn.msg.  When    90 percent utilisation or more is reached, this message is copied verbatim    to their mailbox.    To change the percentage to something other than 90, edit     QUOTA_WARN_PERCENT in vdelivermail.c and recompile.* DOMAIN QUOTAS    If you want to implement a quota for a whole domain, you have 2 options.    You can either put the domain under a unique system id and implement    system quotas, or (as of 5.3.18) you can use a non-system domain quota.  To     implement the former, just use 'vadddomain -u <system user> <domain>' and    set the system quota for that user.  To implement the latter, you must first    compile vpopmail with "--enable-domainquotas=y".  Then, you can add this to     your .qmailadmin-limits file        quota 50	maxmsgcount 1000    This would set a total domain quota of 50MB , and a maximum    message count of 1000 messages for the entire domain.  Modification of     domain quotas should be done with the vmoddomlimits program.    NOTE: Non-system domain quotas are only enforcable when vdelivermail is the    local delivery agent.  If you pipe your mail into anything else, like    maildrop, then the non-system domain quota will be ignored.  An alternative    would be to install the domain under a unique system user (vadddomain -u)    and set system quotas on that account.* CAVEATS    MAILDROP    If you use maildrop for filtering, compile it with maildirquota support     if you want to use it with vpopmail 5.1.1 and above with quotas.    POP SERVERS    qmail-pop3d does not update maildirsize when you delete messages.      Furthermore, when using aliases via .qmail files, qmail-local does not     know about Maildir++, so messages delivered directly by qmail-local do not     get added to the maildirsize file either.  These problem should correct     themselves within 15 minutes according to the Maildir++ specification, but     this does not appear to be that reliable yet.      The best available solution is to patch qmail with qmail-maildir++.patch,     included in the contrib directory of the vpopmail source.  It will add     Maildir++ support to both qmail-pop3d and qmail-local.* CREDITS    deliverquota was written by Sam Varshavchik <mrsam@courier-mta.com>    deliverquota -> vpopmail integration by Bill Shupp <hostmaster@shupp.org>