Email on the bounce list

I got a pop up saying my email is on the bounce list...I switched it to a coworker's but it said the same thing.  What do we do?

I checked your form notification and I've found out that the email recipient (bradle***llf@naturalsciences.org) is in the bounce list.

This email address (mirand***owdy@naturalsciences.org) is in the bounce list as well. I believe this is your primary email address.

I have removed them from the bounce list. You should be able to receive new notifications now. You can also revert back your account's email address.

Please check these helpful guides:
How-to-Prevent-Email-Bouncing-Related-Issues
How-to-Remove-Your-Email-Address-from-Bounce-List
Why-I-am-not-Receiving-Email-Notifications

Hope that helps. Thank you.