On your hosting account you can send 100 emails per hour. This modest threshold is in place because the server that your account is hosted on is shared and has not been designed for mass-mailing purposes. Please understand that regrettably we are unable to increase this amount.
For situations whereby you need to send more than 100 emails per hour, please consider alternative email solutions such as
MailChimp or
MailGun who are designed for large volume emailing services.
