Nice presentation of paragraphs from blog text also in the email

Hi, I am using the Subscribe by Email plugin to send new blog entries to email subscribers. The author of the blog is no techie. So she does not enter the blog text in html form but she uses the "visual"-tab to enter her text. Breaks created with two "enters" are are nicely presented as new paragraph in her blog. However, in the email in some email programs like yahoo web interface, the breaks are not visible. This makes the text look much less nice. Is there a way to make the text look nice in all common email programs?

Best regards, Torsten (on behalf of the author Dilek)