To test your email newsletter, first login to Campaigner and then click the "Email Campaigns" tab.
Next, click the Title of the Email Campaign you would like to test and then click the thumbnail icon of your email to Preview it.
From the Preview page, Campaigner will show your RSS snippet-code rather than your blog content. To see your blog content, send an email test to yourself. Campaigner will merge your blog content into your email test. Whatever content exists on your Blog and RSS feed will be pulled into your email when the email is sent.