mailproxy is a simple SMTP proxy. It receives emails through an unencrypted, unauthenticated SMTP interface and retransmits them through a remote SMTP server that requires modern features such as encryption (SSL, STARTTLS) and/or authentication (SMTP AUTH). mailproxy is primarily useful for enabling email functionality in legacy software that only supports plain SMTP. By default, mailproxy looks for a config.ini in its own directory. If you have placed your config file elsewhere, you can run mailproxy using python mailproxy.py <config_file_path>.