a new feature at page level has been implemented in OOOGUI: "render as newsletter". when this option is checked, OOOGUI will post-process the page before sending it to the browser, so that it is as mail-friendly as possible. post processing includes: absolutizing all HREF and SRC urls, elmiinating offline CSS, custom headers and footers, etc. thanks to this feature you can create special pages in your website to be used as newsletter. you just have to save the page as static html from your browser, and send it with tools such as phpList.