His posts typically reflect real situations that required real solutions. Many of these solutions are compiled from several other blogs or just personal experience and put into a easy to follow process.
SMTP Server Connection Diagnostics Tool
The SMTP Server Connection Diagnostics Tool is a free utility will enable you to troubleshoot SMTP Server issues more easily than using telnet. It supports both open and SSL connections and contains a built-in library of commands such as EHLO, DATA, RCPT TO, etc.. Nothing to install, just run the executable and step through your commands.