Aha. Template summary is not what I expected. I thought it would display the summary ($event->introtext;) in addition to the baisc event things. Summary is interpreted as a summary of the event display.
The vertical spacing (extra white lines) is strange within Office Outlook.
I discovered that when i replace all <p> with nothng and </p> with <br/><br/> the excerpt (summary) text above the 'readmore' is correctly displayed. It does not work when text is centered. So I need to develop a more complex php to transport the text to the newsletter in a form that is compatible with the e-mail readers.
Extra white space lines are added by MS Outlook. After long reseacrh I found out what caused this:
The event starts with a title that is a link. It is (in events and summary) build as:
Moving the <a>..<a/> within the <h2> ... </h2> solves this !! Display in MS Outlook is now according the preview.
I'm working on an 'exerpt' version that I will send in