I have not worked with CM but there is a project comming.
What i would like to know is the following. Is it posible to create like two versions of the newsletter. For the online version the text would be longer than in the email client...
Maybe something like
Header txt 1
Lipsum the pipsum this is shown in the email client and webbrowser
this only shows in the browser or online version of the newsletter
Read more online link ->
I don't think this is possible. (welcome to be corrected however!) My only suggestion would to create two versions manually and link to the page, otherwise the logical thing would to use a 'Read More' link to go to your web page. It makes sense to direct users to your website anyway as you have better chances of a conversion once there.