Remember to Check Your Emails
Before sending emails out to your entire list, its worth the time to utilize a spam checking service.
MailingCheck.com offers a free downloadable tool for Windows that uses SpamAssassin to check. If you prefer to avoid downloading any software, you can send email to theIsNotSpam.com service and they will also check a few other items important to email deliverability. Alternatively, ProgrammersHeaven.com uses a form-based solution to test your emails.