About bounced emails: are mailings repeated even if the email bounced? Do we have to delete or unsubscribe those emails?

Emails that have bounced will not receive any other communication from you. However, all the leads actions will still be registered in PUBLITRAC.
If one of these actions modify the email address, there will be a new attempt during the next mailing.

If however the lead unsubscribed themselves or considers your send out as SPAM, no other communication will be sent.