Postfix has a NUMBER of tools for rejecting unwanted messages before they get in the door and waste your CPU time on deciding “hey this mail is spam”. Up until recently I’ve mostly used the relays.ordb.org check (which in the last couple months has now gone defunct.) When we started noticing problems with ordb.org’s responsiveness I planned to investigate other blacklisting options and found several. Obviously there are advantages and disadvantages to blacklisting. The first disadvantage is you have turned over control of blocking mail senders to an outside authority and you should familiarize yourself with THEIR policies for listing (and delisting) a server.
Tag: CPU
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Multihead PC
More than once I’ve wished for a second (or third) set of keyboard/mouse/video for my main desktop. Linux is a true multiuser operating system which means that it’s capable of hosting multiple graphical logins at the same time. For MOST things, a single, modern CPU is more than adequate to deal with this (memory is usually the limitation, but 1 GB ought to be enough.) So, I think all of this was prompted by a blurb about hubster which looks like it’s just a VGA-usb adapter. The company that makes it though bill it as a thin client of sorts. So, they’re essentially thinking thin-client over usb as opposed to thin-client over ethernet…
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AMD comes out on top in Dual Core CPU showdown
ZDnet has a showdown between AMD and Intel dual core processors. It looks as though AMD has won in every comparison. This is not the only good news for AMD lately as summarized here. Intel’s overwhelming dominance is not what it used to be.
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BIOS Beep Codes
One of the nice things about working on computers is that when it comes to the raw hardware of a system, the engineers have designed a way to communicate what’s wrong (even if it’s just a general idea) even when the hardware has a pretty serious problem. When a computer boots it goes through a POST *(Power On Self Test). This POST process basically is the BIOS (Software embedded in the hardware of the system that exists whether or not an Operating System like Windows is installed) “waking up and testing the hardware.”
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LCD displays versus older CRT displays
Sometimes I find that people are surprised that you could replace just the monitor (the display) of your computer without replacing the tower (the part that holds the CPU and drives). You can though and it’s a pretty easy thing to swap. There are however some choices out on the market and a bit of confusing marketing. LCD’s have the coolness factor to them and for good reason, they take up less space, use less power and are usually easier on the eyes than traditional CRT monitors. There are a few things worth knowing when you go out to buy a new monitor though.
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