The latest version of Mailpress does NOT include paragraphs in the HTML emails. I tested this with the twenty ten and twenty twelve templates and when the mail is sent it does not have paragraph breaks, making it all look like one big paragraph, even when viewing it in the browser. If you add the
<p></p> tags it just deletes them.
This has been mentioned before on the Google Group, with no practical resolution.
To resolve this issue, add
<BR /><BR /> to create a double line space.