AY SMTP Diagnostic Tool - If you have a problem setting up your mass e-mail software AY Software Diagnostic Tool will analyze your SMTP connection. The tool will try to send several e-mails using various methods. It tests both direct sending and your SMTP server. If you do not know your SMTP server the tool will do its best to find it for you. You will find out what are the best settings for your mass e-mail software. No installation is required.