SMTP Proxy

SMTP Proxy

SMTP proxies are specialized Mail Transfer Agents (MTAs) that, similar to other types of proxy servers, pass SMTP sessions through to other MTAs without using the store-and-forward approach of a typical MTA. When an SMTP proxy receives a connection, it initiates another SMTP session to a destination MTA. Any errors or status information from the destination MTA will be passed back to the sending MTA through the proxy.

Read more about SMTP Proxy:  Types of SMTP Proxies, See Also