Unsubscribe and preferences

Every email ends with the compliance footer and an unsubscribe link. The link opens a page asking Unsubscribe from {sender}? with the recipient's masked address and one button; no login or form. When the email came from a campaign on a list, a second button stops only that list's emails. With the preference center enabled, Manage email preferences lets the recipient tick and untick the lists they belong to, with the full unsubscribe always available beneath. Mail clients that support one-click unsubscribe work too.

Unsubscribes take effect immediately, land on the Suppression List, and are recorded in the audit log.