Allow off-site users to get their Quarantine Digests

The most common reason users can't retrieve their Quarantine Digests is that the digest has a URL with a private IP while they need a URL with a public IP. You'll need to verify a few settings:

1. Under Config > Network > Hostname, choose Use Hostname or Use Manually Specified IP, as appropriate.
2. If using Use Hostname, make sure your hostname is properly configured and publicly resolvable at Config > Network > Hostname. If you're using a dynamic IP, it's recommended to set up Dynamic DNS on the same page.
3. Under Config > Network > Advanced > Access Rules, make sure "Allow HTTPS on WANs" is enabled.