s/qmail:

Section: Misc. Reference Manual Pages (qmail-recipients)
Updated: 8
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NAME

qmail-recipients - prepare recipients for qmail-smtpd

SYNOPSIS

qmail-recipients

DESCRIPTION

qmail-recipients reads the addresses provided in SQMAIL/users/recipients, converting into lowercase, and writes them into SQMAIL/users/recipients.cdb in a binary format suited for quick access by qmail-smtpd.

If there is a problem with users/recipients, qmail-recipients complains and leaves users/recipients.cdb alone.

qmail-recipients ensures that users/recipients.cdb is updated atomically, so qmail-smtpd never has to wait for qmail-recipients to finish. However, qmail-recipients makes no attempt to protect against two simultaneous updates of users/recipients.cdb.

The binary users/recipients.cdb is compatible with setforward generated 'fastforward' cdbs and it's format is portable across machines.

CAVEATS

In case the resulting cdb is wrongly populated or empty, the lookup will always succeed and thus any address will be acccepted.