A Suppression List (also know as an Opt-Out List or an Unsubscribe List) is a list of suppressed email addresses used by email senders to comply with the CAN-SPAM Act of 2003. 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 unsubscribed email addresses are placed into a Suppression List which is used to “suppress” future email messages to that email address.
A Suppression List contains valid email addresses. Suppression List abuse occurs when a third party takes a Suppression List and emails messages to the email addresses in the list. The original sender of the email messages who provided the opt-out mechanism may be liable for Suppression List abuse.
A variety of technological means are used to protect Suppression Lists and track Suppression List abuse. These include neutral third party scrubbing of email lists, distribution of MD5 secure hash suppression lists and distribution of “seeded” email lists.
In regards to OPTIZMO
A Suppression List can be uploaded and maintained or created and maintained via the Optizmo System. We offer the most user friendly interface with the best security for Advertisers and Mailers to easily manage Campaigns and Suppression Lists.