Boldt Webservice offers a couple of extensions to Joomla! and VirtueMart.
BwPostman is a complete and extensive newsletter extension for Joomla!® 3.3.6. Despite the manifold possibilities handling BwPostman is easy and intuitive.
BwPostman provides some templates for newsletters, which can modified for special needs and covers most use cases.
If new templates are released, You find them here and You can easily install them in BwPostman.