Depending on how your company's Preference Center is configured, the system allows recipients to opt out from an individual user or from all users at your company. Recipients may also be given the option to opt out or into certain lists. Contact your administrator for additional information.
Once a contact has opted out, you will not be able to send to them any more.
If you receive any requests to opt a contact out, you will need to address that request manually. To manually opt out a contact, locate them under the Contacts section, click the down arrow next to their name, and select Opt Out.
To request that a contact be opted back in, contact Support.