We're considering enabling the QUOTA checking features that come with Andre's LDAP patches for Qmail 1.03 (an OS independent quota system). Since this is going into a medium/large production system (250K+ users) where we use single UID delivery for all users; can someone first describe the mechanics of how these quota checks are done? I'm not a C programmer, but from looking at the source code, it appears that several of the QMAIL binaries have been modified to look for special files in the $USER/Maildir directory. It then looks like it stat() every file under the user's Maildir to see if it exceeds the limits set-up (either globally in control file of via LDAP mailQuota). Biggest concern is performance and load impact on the system, especially in instances where a user has a large number of mail files (thousands). I looked through all of the archives and could not find any description of these QUOTA features. Thanks --curtis
