If a candidate has accidentally unsubscribed from emails, you can update this yourselves. Find the candidate and open the profile.
These icons will show next to the candidate's email address if it's unsubscribed. You can also use the filter Communication preferences to find unsubscribed candidates.
Scroll down on the profile to find Email preferences. Depending on if it's a global unsubscribe or via the communication preferences it might look a bit different. If its done via an email choose "select all" or check the boxes needed.
If the candidate is globally unsubscribed, you need to confirm that you received confirmation that the candidate agreed to receive emails again. This is according to GDPR.
If the candidate still does not receive emails, please contact support, as they may have reported the emails as spam and Globus will need to remove the spam report.