Below are common questions (with answers) that I receive in my Mailchimp classes in relation to the Email Marketing column in a Mailchimp Audience.
There are four possible value that may be present in the Email Marketing field; Subscribed, Unsubscribed, Cleaned and Non-subscribed (i.e. an empty value).
Note that if a contact unsubscribes from an email campaign sent from a specific Audience then that contact won’t be unsubscribed from other Audiences where that email address appears i.e. the Unsubscribe status is Audience specific.
The email address is marked as Cleaned in Mailchimp when the email address results in a hard bounce or multiple soft bounces. It isn’t possible in Mailchimp to send email marketing to Cleaned email addresses.
You won’t be able to send email marketing to Non-subscribed contacts in Mailchimp.