When using Advanced Import of subscribers follow these steps below:
1. Import of Active contacts --> mark status 'CONFIRMED'
2. Import Unsubscribed contacts (if you have a database of subscribers who seriously unsubscribed from your emails) --> mark status as 'UNSUBSCRIBED' and select 'Overwrite' option
3. Include Bounced email addresses
To include bounced email addresses please follow this procedure:
SUBSCRIBERS menu > Maintenance > open 'Bounces' tab > copy&paste bounced email addresses (one email address per line) in a window > click 'Mark emails as bounced'.
You can check the status of your subscribers from SUBSCRIBERS > Statistics > Overview tab.