i have a program which use to send group emails, i set a cornjob per mins for this program, and set execute per 2nd/min, and check if the now time is match to my defined schedu
I think you should set this configuration at the application level rather than the cron job level.
Let's say, cron job should run every minute but the application itself should know howmany e-mails to send when a cron job runs by checking the datetime for the last e-mail is sent, and let's say, send 3 more e-mails and so.