Under NT it can run as an application or as an NT service.
Configuration is straightforward.
There is also control over which domains are allowed to relay mail through the server. This is important because spammers can use relaying to distribute messages, and you end up getting the blame for their activities. FTGate also supports direct delivery to target SMTP hosts through Domain Name System lookup of mail exchange records, and falls back to the defined ISP's SMTP server or holds the failed messages in the local mail queue. It allows user and administrator access and lets you add, modify or delete any type of mailbox. Combine the remote management with the robot features and you can create very complex mail-handling systems and even extend the services of FTGate to run management and utility tasks.