Andrew Beaton :: FAQ

To resend the mails in the mail queue, type either of the following two commands:

# postfix flush

# postfix -f

To see the mail queue, type:

# mailq

To remove all mail from the mail queue, type:

# postsuper -d ALL

To remove all mails in the deferred mail queue, type:

# postsuper -d ALL deferred

As most of you know, the smallest time a cron job can be configured to run is every minute.
To run a script every 15 seconds for example, you could use the following:

main cron job:

* * * * * /path/to/wrapper.sh

wrapper.sh:

/path/to/script &
sleep 15
/path/to/script &
sleep 15
/path/to/script &
sleep 15
/path/to/script &

If you can suggest any nicer alternatives to this example, please let me know.