Kill the Newsletter! is a web service by Leandro Facchinetti that converts email newsletters into Atom feeds, helping people read newsletter content through a feed reader instead of an email inbox. Users create a feed to receive a dedicated email address, then subscribe to newsletters using that address. Incoming emails, including subscription confirmation messages, are converted into feed entries that can be read and followed from a compatible feed reader.

The service is designed to give users a practical alternative for managing newsletter subscriptions, though some publishers may block its addresses or require email replies that the service does not support. Users can also set up forwarding from a regular email account as a workaround. Feeds are intended for individual use: their identifiers could allow others to alter subscriptions or send unwanted email, so the service recommends sharing the site rather than a feed. Entries older than one month may be removed, and older content can also be deleted to keep feeds within size limits.