Why my email ended in the Bounce list?

trying to use this email address:  brent.robbins@memseo.com

but I get this message:

I need to be able to use this work email address.

I checked your email address but it is not in the Bounce list now:

So I couldn't check the reasons for email bouncing.

Could you please check if you're receiving emails to that email address?

We'll wait for your response.