Telnet to your smtp server, then go through the smtp commands that are available through searching for smtp protocol. This will allow you to know what to send to the smtp server and what to expect back, like +ok messages. Using Telnet you can test the smtp commands to be and messages coming back, then build your Blitz program from that. You MUST know what the gmail server is expecting, and how it expects your information to be sent. Most SMTP servers are standard (obviously), but it is good to know what messages to expect.