Slimbox

Slimbox securely scans your inbox in seconds. Slimbox can't read your email, so subscriptions are detected with code. Decide where you want subscription email.
Inbox = keep in your inbox
Slimbox = add to daily summary
Trash = send automatically to trash

Slimbox makes it incredibly easy to achieve a clutter-free inbox by moving subscription and notification emails out of your inbox and summarizing them in one daily email.