1st Mail Server is a fast and secure Professional SMTP/POP3 server program. It runs as an unattended Windows NT service and can be easily configured using an accompanying Graphical User interface. You can use this program in many environments ranging from a corporate mail server to a standalone SMTP relay for your laptop. It will accept mail on behalf of your users and store it, until your users will retrieve it using POP3. It has a lot of security features and options that will allow you to protect the server from DDoS attacks as well as safely block majority of the SPAM and spammers. SMTP and POP3 servers work as NT services therefore they will keep working in the logoff mode. For software debugging and testing purposes, the program has a testing mode you can use to check if your email clients work correctly. You can have multiple SMTP gateways in your server if you travel a lot with your laptop. This way, even if you cannot deliver your email directly to the destination, you will still be able to send it using one of the gateways. One of the new features we have recently added provides for parameterized mailing list management. This is not present in any of the other SMTP servers. Using this feature you can actually use this server as a mass mailer. You can create as many parameterized mailing lists as you like and customize each message with up to 50 freeform parameters.