First read the ‘Google Bulk Senders Guideline’ to make sure you are doing things right to make your campaign successful. https://support.google.com/mail/answer/81126
1. Limits For Gmail500 emails per day.Find more detailed information herehttps://support.google.com/mail/answer/22839
2. Limits For Gsuite2.000 emails per dayFind more detailed information herehttps://support.google.com/a/answer/166852
3. Our SuggestionWe suggest to send around 50-100 emails per day. It’s important to be in their inbox not spam folder.