Category Archive: Technology

Apr 13 2013

Yahoo SMTP Deferrals Take 2

Well, our good friends at Yahoo are at it again. Once again they are deferring mail for no apparent reason. Nothing has changed on my system and yet they haven’t accepted a message to deliver to one of their users in 3 days (maybe more).  And, of course, there’s no way to actually contact a …

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Mar 27 2013

Abuse Addresses

Most ISP’s and network providers have specific email addresses that you can report abuse to. These addresses can be looked up using a whois tool. Recently, I’ve noticed a number of those addresses that just don’t work the way they are supposed to.

Mar 27 2013

Tech Tip: Don’t use qmail as a mail server

A while ago I added a new anti-spam technique to my mail server setup called “No Listing”. No listing basically means putting a high priority MX record in the DNS that always rejects mail server connections.. It seems, however, that the qmail mail server can’t cope with that.  It’s not RFC compliant.

Dec 04 2012

Flight Status, Siri?

2012-12-03 17.07.34

OK, I admit it … I kind of like Siri on my iPhone. Some of the features are darn right useful … being able to tell the phone to remind me about something based on location, get the current weather, send a text message by voice, etc. Recently I found a case that Siri seems …

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Nov 20 2012

whois

Here’s a tip for internet domain owners: Make sure the contact information for your domain has more than one email address.  And make sure at least one of those email addresses is not in the domain itself. If your email starts malfunctioning, you want people to be able to tell you about the problem … …

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Nov 15 2012

Adding Envelope Sender in sendmail

Fair warning: This post is pretty darn technical and is of little interest to people who don’t muck around with Linux and/or mail servers. Recently I had a problem with someone on a midrange.com mailing list where they sent obvious spam. The problem was, they were a subscriber to the list and had posted before …

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Oct 25 2012

Blocking Mailbait

Recently I’ve been getting a lot of mail from the feedback loops I subscribe to indicating that someone has gotten a subscription confirmation message and they considered it spam. After digging into my logs I noticed a few things … The subscription requests are being initiated from TOR exit nodes. The web requests that initiate …

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Sep 25 2012

Atrix 4G to Ice Cream Sandwich?

atrix-ics-schedule

For quite a while the owners of the Motorola Atrix 4G have been waiting for an upgrade to the Ice Cream Sandwich (ICS) version of Android. Unfortunately, it appears that we’ve been waiting in vain …

Sep 03 2012

ReadyNAS and SMART Errors

Hard Drive

As some of you may be aware, I don’t put a whole lot of stock in the “SMART” feature of hard drives. Rarely have I had the SMART capabilities of a hard drive actually tell me that the drive was going to fail. Recently I had an encounter with SMART errors in a totally different …

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Jan 02 2012

Spontaneous Security

lock

Over the holiday weekend, I experienced the ultimate computer security mechanism: “Spontaneous Security” I was using my new Dell Latitude E6420 to do some network reconfiguration when the machine started acting weird with regard to the network. Since this machine runs Windows 7, I decided to just reboot it to clear the network configuration. After …

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