A ton of embedded systems and software relies on having an open SMTP relay to send emails. Network printers and monitoring solutions are a prime culprit. Compa

A ton of embedded systems and software relies on having an open SMTP relay to send emails. Network printers and monitoring solutions are a prime culprit. Companies very often have open SMTP relays, actively used by these. It's a plague to remove SMTP because how can you remove open SMTP when these things don't support TLS nor authentication?