IMPORTANT NOTE! All Mass Emails MUST be in compliance with the CAN-SPAM ACT of 2003! In order for your Mass Email to be in compliance and for us to send it out on your behalf, the email (your email template) MUST have the following:
A legitimate physical address (PO boxes are allowed) of your business (you must type out your address in your template – or use %companyaddress%)
The unsubscribe link (you must have the replacement value %unsubscribelink% in your template)
Relevant subject line (must not be deceptive)
Just add %unsubscribelink% and %companyaddress% at the bottom of your email, and you'll be all set!