Two Types of SMTP servers

Xeams comes with two types of SMTP servers:

Normal SMTP Server
SMTP Proxy Server

Normal SMTP Server

This is a typical SMTP server that accepts emails and queues them for delivery. It requires that you specify a set of local domains handled by the server. If any email comes in for a different domain and relaying is allowed, the message will be delivered to the final destination server.

This SMTP server can be used for both in-bound and out-bound mail delivery

SMTP Proxy Server

This is not a full SMTP server. It is a proxy server - meaning it requires another SMTP server (actual server) to connect to. Clients always connect to the actual server through the proxy server, which has the capability of monitoring emails, change its contents and block them if necessary.

This server can only be used for in-bound emails.