Send notification not working and neither is test email

Send notification not working and neither is test email. It worked for many months then all of the sudden it doesn't work anymore.

I tried a different email address and it doesn't work. I checked my spam folders.

When someone fills out an application I am not getting notified anymore.

Please fix

Thank you Donna

Your primary email address has been bounced listed and this is the reason why you are no longer getting the form emails.

don**@**********.net is IN the bounce list 

Reason(s) : smtp;550 5.1.1  - 198.2.128.12 has sent to too many recipients this hour. IB607 

I've fixed this for you. We suggest adding noreply@jotform.com to your safe sender list as one of the measures to prevent this from happening again in the future. 

If you keep getting this problem, we suggest using an SMTP to send your form emails:

https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form

For email related problems, the following guides should help: 

https://www.jotform.com/help/208-How-to-Prevent-Email-Bouncing-Related-Issues

https://www.jotform.com/help/364-Why-I-am-not-Receiving-Email-Notifications