Sendmail doesn't need to be restarted for changes to the virtusertable.db to be recognised (obvious when you think about it).
This means I can have a script (let's call it dbvut for now) that runs on the mailserver and fetches pairs of email addresses from MySQL and emits them on STDOUT in the form:
$source $target
I can then update the virtusertable.db mappings with a simple root cron of the form:
*/5 * * * * /usr/sbin/dbvut | makemap hash /etc/mail/virtusertable.db
dbvut will need to suck in and emit the contents of /etc/mail/virtusertabl or I'll lose all my static mappings, and I need to remember to change the sendmail rc script where it rebuilds the .db files on startup.
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simon
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