Why am I getting a error message when replying to people who have completed my form?

We usually have a limit on the number of emails that can be sent in an hour from jotform, this is to reduce the chances of the email service being used for spamming.

Free accounts have a limit of 20 emails per hour, when this limit is exceeded you will receive a message stating that you have reached your limit.

Kindly wait an hour before sending the emails again.