Chilkat created a free service that allows you to check an email’s Spam Assassin score:
Spam Assassin Score Testing
Here’s how it works. Send the email you wish to check to firstname.lastname@example.org. Then goto http://www.chilkatsoft.com/satCheck.html , enter the FROM address of your email, and click the Submit button. The result page provides the Spam Assassin results for your email.
A Few Notes:
1) Emails are automatically deleted after two days. This may change depending on the volume of emails received.
2) It is only possible to see the last email sent for any given FROM address.
3) Chilkat generally does not look at the emails sent to email@example.com unless you have questions.