ELI5: Explain Like I'm 5

SMTP proxy

An SMTP proxy is a computer server that works like a postman. It takes emails from one computer and delivers them to another. For example, if you send an email to your friend, the SMTP proxy will pick up your email and take it to your friend's computer. This way, your emails are delivered more quickly and securely. It also helps reduce spam because it can check the messages for bad or dangerous content before sending them.