Just to cut the chase here, I would have to say that this is slightly outside the scope of Imagevue. For a proper newsletter/mail-list system, you need a system tailor-made for this. They have PHP mailing-list systems, and they have online ones like
http://www.mailchimp.com - This is nothing we would build from scratch into Imagevue, as it is way beyond what we are capable of managing.
We could of course tweak the interface so that it linked up towards a separate email/newsletter system. Eg. that the user "subscribes" through Imagevue, but that data is sent and managed through a separate system.
E-mail newsletter system can be quite heavy. They need a database, some functionality for managing the entries and templates for sending.
A simple solution would perhaps be to use the contactform so users can "subscribe" and then you can manually handle the incoming emails. For example add them to a system like mailchimp, or simply store them in a "group" in your email client ... You could simply email to an entire group from any modern client like outlook ...
