How to configure Sendmail to relay only 500 emails per day per email account basis

[sanjay dass]

Hello Experts,

I have configured sendmail and it working properly,

Now I would like to put restriction on SMTP relay to send only 500 email per
day, per email account basis.  like most of the hosting company does.

Could any one help me out how do I configure the Sendmail for the same, or
Is there any third party software,

Thanks in advance

Sanjay