When an email channel is selected in the Channels configuration interface, you can create a Re-subscribe contacts job by clicking the Choose contacts to re-subscribe to this channel button, specifying the contacts’ email addresses in the Re-Subscribe Contacts dialog (as described in the Configuration Workbench documentation), and then clicking the Create job to re-subscribe these Email Addresses button in the same context.
Doing so creates a Re-subscribe contacts for [channel name] job.
The job removes the email addresses provided from the channel's email subscription table, and also from the email provider’s subscription records.
On completion, the job’s status advises of the number of contacts successfully re-subscribed at the channel.