create an online newsletter?

[Rich]

[Jake]

Blog platforms with their built in indexing by date sort of facilities would seem suitable. There are magazine look themes for blogs that would be a good fit. The industry standard Wordpress platform used for 17% of the top 1 million sites has the most options.

More often a newsletter would take the form of an email sent out to a subscriber list, an associated web site might be used to recruit subscribers to that list, single purposes opt-in form pages are called a "squeeze page".