The plugin may hlep you add contacts to Zoho Campaigns.
The plugin may hlep you add contacts to Zoho Campaigns mailing list. For more about Zoho Campaigns you may read from http://www.zoho.com/campaigns/ .
It is easy to use. Once the plugin activated there will have a widget for you to add to your site. If users entered their email address and click submit then the email address will be post to Zoho Campigns and into the mailing list you specified.