If you are a system administrator you probably manage one or more email servers so things eventually will go wrong and need to be resolved as quickly as possible. It is beneficial to know how to troubleshoot email servers using telnet via a shell so you don’t have to rely on a GUI mail client. Below I describe how to login to an Exim email server using telnet, authenticate via SMTP authentication, and then send test emails. The below examples will be run from a terminal window on Linux however they should be very similar too running the commands from a Command Prompt on Windows 7 or any other operating systems using a terminal window or similar.
If you are attempting to play an embedded QuickTime file (.mov) and it appears to be loading forever the chances are that you do not have QuickTime or the proper plugin for your browser installed. You can check if your browser is functioning properly by visiting this link here. If that movie plays correctly then your QuickTime plugin is functioning properly.
If the movie does not I suggest installing QuickTime by downloading it here. Please note that unless you want iTunes installed as well you should click the second radial button to install QuickTime only. Once downloaded double click the installation file and follow the guide to install QuickTime.