The system has a sign up module that is on your site. You can also integrate signing up for newsletters into your registration process for new members. Also, in the Pro version of Acajoom you can create sign up forms that can be posted on other Websites so that people can sign up remotely for your newsletter. This is great for co-operating with other sites, but also in the case that your organization or business has more than one site such as a Facebook group, mySpace group, blog, etc. that needs to feed subscriptions back to central mailing lists.