lay back and relax

DRAC is a daemon that dynamically updates a relay authorization map for
sendmail. It provides a way to allow legitimate users to relay mail
through an SMTP server, while still preventing others from using it as
a spam relay. User's IP addresses are added to the map immediately
after they have authenticated to the POP or IMAP server.

skopeo is a command line utility for various operations on container images and
image repositories. skopeo is able to inspect a repository on a Docker registry
and fetch images layers. skopeo can copy container images between various
storage mechanisms.