How to Test Your SPAM Filter
Sometimes as email administrators we need to test if the SPAM filter works and is filtering messages. In order to do this we need to send a test message with content that we are sure is rated as SPAM.
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Public Email Addresses Cause a Lot of Spam
Is your email address is published on your website on Internet? This might be the reason for a lot of your spam.
How to make a Loopback Cable
Sometimes in order to test a computer’s hardware or software we need a network link for the network adapter. The solution, very often, is to carry around a hub.
If you don’t want to carry around a hub, or you simply don’t have it, you can create a network loopback cable. The loopback cable will work as the computer was connected to a real network transmitting and receiving packets. This kind of setup allows the technician to troubleshoot hardware.