qmail-recipients reads the addresses provided in
/var/qmail/users/recipients, converts them into lowercase, and writes them into
/var/qmail/users/recipients.cdb in a binary format suited
for quick access by
If there is a problem with
qmail-recipients complains and leaves
qmail-recipients ensures that
users/recipients.cdb is updated atomically,
qmail-smtpd never has to wait for
qmail-recipients to finish.
qmail-recipients makes no attempt to protect against two simultaneous updates of
users/recipients.cdb is compatible with
setforward generated 'fastforward' cdbs and its
format is portable across machines.