Cron is repeating every minute

Question

This is how it looks

* * 10 * * php sendmail.sh

I want this to send mail on the 10th of every month.

Answer 1

Then you need to set a time. * means repeat minute/hour/day/whatver. What you want is

1 0 10 * * php sendmail.sh

Answer 2

Here is a nice reminder :
_{(source: joshhighland.com)}