Importing Hard Bounce Contacts

Hello, I would like to keep a list of previously hard bounced contacts in hubspot. However, these contacts have been hard bounced using another marketing email website.

Is there anyway I can import emails I know have previously hard bouced so I don’t accidently email them again? Remember the hard bounces were not incurred from using Hubspot’s marketing email feature but another website.

Please see Import an opt-out list.