May 142013
 

dkim-process

Article By Chris Pentago

Goal of this how-to: Step to step guide on how to setup  OpenDKIM with postfix on Debian GNU/Linux to send signed email from your VPS.

There are numerous methods or techniques that you can use to achieve email message signing. Good examples are DomainKey as well as DKIM which is an abbreviation for DomainKeys Identified Mail.

DomainKeys Identified Mail (DKIM) lets an organization take responsibility for a message that is in transit.  The organization is a handler of the message, either as its originator or as an intermediary. Their reputation is the basis for evaluating whether to trust the message for further handling, such as delivery. Technically DKIM provides a method for validating a domain name identity that is associated with a message through cryptographic authentication.

These two techniques will not use symmetric encryption but rather will employ asymmetric encryption. (more info: http://support.microsoft.com/kb/246071) In both methods, the common algorithm used is RSA. This algorithm is also the default for these methods of achieving email message signing.

For those wondering about what asymmetric means, the following is a detailed explanation. It is a technique that utilizes a key to sign the email message. Other methods will not require a key. One can have two types of keys: a private key and a public key. These keys will come into play to verify the message as well. The two methods of creating email message signing as highlighted above are filters for SMTP server. DomainKey works with a dk-filter although this filter has been discontinued in the market. OpenDKIM has become the preferred replacement where filters are concerned.

A mail server must be enabled with a filter to set up the server properly. In light of this, Postfix can be used because it is enabled accordingly. Another requirement is the freedom to add or change the DNS records as you desire. With the above in mind, the following is a step by step guide on how to set up Postfix email server with DomainKey Indentified Mail on Debian.

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Nov 282012
 

Article by Jason Phillips

If you’re a real gamer you know just how terrifying Windows 8 can be. With the changes they’ve made there just might not be any sort of viable way for real gamers to get the kind of experience they want.

Expect seriously inconvenient DRM implementations and major difficulties for independent developers because of the proprietary (and profitable) app store built in to Windows 8. Independent developers are going to have no choice but to make the transition, meaning quality free games will disappear, too.

The Big Boys Will Still Be There, Though… Right?

You can expect the Steam client to be present on Windows 8 for a long time to come. There will also be many games and franchises created by your favorite publishers. But with many of the issues we’ve seen even the biggest publishers face with app stores, they might not be willing to work as hard as Microsoft wants them to.

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Jun 102012
 

Article by Giuseppe Sanna

The mythology and history tell us of great struggles between sworn enemies. David and Goliath, Caesar and Brutus, Robespierre and Louis XVI are only a few. But for some years now in addition to this huge list we have two big names in the information technology! The multinational Microsoft and the GNU/Linux open source operating system. The struggles between the two never ends!

While Microsoft is trying by all means to keep under its control the market of the desktop, Linux itself in recent years is reaching incredibly important goals, mostly on the servers and embedded systems (Android ?). Despite the low blows of  Microsoft, we can just take a look at the mythological UEFI chips, Linux does not give up though. Indeed, it always win a larger slice of users thanks to its distributions. Each of which, of course, choose a different path. Continue reading »

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Synaptic Package Management - Linux's Secret Weapon

Synaptic Package Management – Linux’s Secret Weapon

I’m glad to have another post of Tcat Houser editor-in-chief of TRCBNews.com. With the World Mobile Congress in Barcelona for year 2012 behind us, we now see what Apple has in store with Mountain Lion and Microsoft with Windows 8. It seems very clear Microsoft is trying to catch up to Apple with the concept […]

Ex-cluding Linux

I’m glad to have another post of Tcat Houser editor-in-chief of TRCBNews.com. With Apple’s big announcement for March 7, it seemed appropriate to look at the *NIX derivative BSD on which OS X and IOS are based. Specifically, were going to take on file system. And looking with the skeptical view of how American public […]