You can, quickly and easily, create new segments of recipients on your Ubivox-account - this lets you send e.g. to people that have bought a product in your webshop or have clicked a link in a previous newsletter.
In Ubivox we create a URL with a subscribtion form that you can use on your site, the guide here shows where to find it and how it looks and what parameters and HTML you need to have to make your own status pages.
If you are sending the same newsletter to several list you can, with a few clicks, create a distribution which handels the process for you. Additionally it collects statistics from all the newsletters into one manageable list. This guide guides your through the process and elaborates how it is done in praxis.