How do I get Subscriber to process subscriptions received through Group-Metrics.com ?
This is described in the Help files included with the Subscriber Add-On. If you have not yet purchased GroupMail or cannot currently access the help file, a copy can be downloaded from here. In summary, your recipients can opt-in and opt-out through the Group-Metrics web service, the Subscriber Add-On will update your groups with the subscriptions stored on the site. Setting up Subscriber to integrate with Group-Metrics is described in the Help file, open the Help file either via the Subscriber Add-On Help- >Subscriber Help Topics menu or by downloading it from the link above. Display the topic as shown in Figure 2 below.
