Mail Server Rejecting all Messages – Check your Blacklists is listing the WORLD

Monday, March 31st, 2008

It’s unusual for mail servers to suddenly start rejecting messages internally and from external sources. That’s exactly what I saw though over the weekend. A mailserver running mdaemon on Windows 2000 was rejected ALMOST every message that was sent it’s way whether it was an internal mail sender and recipient or external sender to internal [...]

Why? (Why couldn’t AT&T make sure their mail servers weren’t using old dialup IPs that are blacklisted….)

Tuesday, July 24th, 2007

Why do I always wind up being the one to discover problems? …. Today in checking mail I found a mail that had bounced back from one of my clients that uses bellsouth… Now bellsouth has recently been bought by AT&T and it appeared as though the mail had been rejected because the mailserver trying [...]

More postfix spam blocking and Whitelisting….

Monday, January 22nd, 2007

I almost forgot to pass along a link to a more comprehensive detailing of postfix’s anti-uce controls…. here. Also, in the last article I briefly mentioned whitelisting. IF you intend to have several blacklists active it will pay to learn how to whitelist before you HAVE to. To do so, I simply created a text [...]

More postfix spam blocking….

Monday, January 22nd, 2007

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 check (which in the last couple months has now gone defunct.) When we started noticing problems with’s responsiveness [...]

Firewire/USB card and ethernet incompatibilities on Ubuntu 6.06

Saturday, November 4th, 2006

I’ve had a machine for quite a while that I’ve been working on as a “backup server”. My goal with it is to have a RAID1 setup with two 250GB drives and I also wanted USB2/firewire functionality so that I could even add a USB drive to the array for the purpose of having a [...]

New variation of Sober virus coming in January

Wednesday, December 7th, 2005

Now, we seem to be getting “coming attractions” previews in virus-land…. Anyway, I’ve read at several sources that we are to expect a new variation on the sober worm around January 5th, 2006. It’s said that the date was chosen to mark the formation of the Nazi Party. In the past, variants have spouted pro-nazi [...]

Google not talking to cnet?

Friday, August 5th, 2005

According to the tail end of this article, Google has decided they are not talking to CNET new reporters until July 2006. Yet another good example of why it’s a good thing to have competition in the online search market.    Send article as PDF   


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