The list sweeper was designed to make managing your list easier. You can run the list sweeper on one list at a time or many. Simply check the box(es) next to your list names and click the sweep button.
The list sweeper performs bulk actions on any list(s) being swept at the time. Below is a screen shot example:
Opt-out known bad addresses - This process happen automatically at send time, as well as when you upload a list. This option will compare your list(s) against your Global Opt Out list, as system wide opt out list, and list of addresses we maintain of previously identified as invalid addresses. Checking this option will mark each recipient as opted out.
Opt-out select Soft Bounces - This part allows you to deactivate (opt-out) addresses that are soft bouncing in your list. While soft bounces are transient in nature, it is wise to frequently remove abandoned email addresses, lest they be reclaimed and turned into spam traps. Early warning sign bounces can be labeled as Soft Bounce - DNS Failure, or Soft Bounce - Mailbox Full. We recommend that you opt out these last two types of soft bounces. Especially the Mailbox Full addresses as they can be reclaimed and turned into spam traps.
For more detail on soft bounces see here and/or check out the bounce guide.
Remove all recipients in the list flagged as hard bounce.
Remove all recipients in the list flagged as opt-outs.
Both of these sections will permanently remove hard bounces (invalid addresses) and opt outs from your list. This step is optional. Hard bounces and opt-outs are marked as inactive recipients. We keep them in your list so you can export the data for your own needs, but inactive records are NOT emailed in your campaigns, nor do they count against your list size total for billing purposes.