Writing an html message via the editor does not generates too good looking e-mails. If you want to send perfect html e-mails (i.e. in a form of an electronic newspaper) then I suggest you to use a pre-made html template.
Make sure your DNS server has SPF records for the e-mails.
The unsubscribe link is a sample, you should copy-paste the real url from your site there. The un-subscribe page is the component's front-end main page. If you have SEO PRO enabled this would be:
I have included 2 samples as html templates. Download them, edit them to add you content,
Doew any body nknow what this does it means?