If you decide to use quarantine digests, you can set the approval address alias and the expiry period on the Digest Options page. The approval address alias is the reply-to email address that is set in the quarantine digests that are emailed to end users, and it is this email address to which your end users respond to release or delete their messages from the quarantine. The expiry period is the length of time that end users have to respond to the quarantine digests.
To set the quarantine digest options: