Mail account
By default, each Post Affiliate Pro account/license uses PHP mail() function to send emails. The maximum number of emails that can be sent using this function is 20 per hour. If you try to send out more emails than the limit allows, these emails are automatically put in a queue and sent in the next hour.
Your affiliates can receive many kinds of email notifications from the system(for example about each new commission) and with the growing number of your affiliates, you can get to the point whe...