What is a suppression list?
A Suppression File is a list of suppressed email addresses used by email senders to comply with the CAN-SPAM Act. CAN-SPAM requires that senders of commercial emails provide a functioning opt-out mechanism by which email recipients can unsubscribe their email address from future email messages. The “Opt-Out” email addresses are placed into a “suppression list” which is used to “suppress” (stop) future email messages to those email addresses.