While you are thinking about how many emails you want to send out, think about how many your contacts want to read.
Less is often more effective, and more are often spammy.
Therefore, the maximum email limit in Automizy is:
Contact Number x 10 emails per each month.
During the trial version, you can send out 100 emails.
If you exceed this, you will not be able to send any more emails in a given month (or period of payment) and a label will draw your attention which writes "Email limit reached".