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Testing postfix header_checks with postmap -q

This post makes some assumptions, for example that you use Postfix, Ubuntu, and regexp format for your header_checks, etc. but I find that testing new rules isn’t all that well documented and I always forget how to do this. Testing header checks with postmap -q: For a single line: postmap -q “From: my spammer” regexp:/etc/postfix/header_checks […]

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Jawbone / myTalk Password Breach

Today I received an email from Jawbone explaining that their myTalk customer password list had been stolen by hackers. They say passwords were encrypted, but they do not say how they were encrypted. If they used pig latin to encrypt, then I should immediately go about ensuring that the password I used on the myTalk […]

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We are a China based imaging professionals / Rick photo editing spam!

After years of putting up with Rick and his digital photo editing services crap I think I have finally figured out a way to block these messages. Here’s the deal. You run a mail server, and you get spam every single day from Rick offering digital photo editing services. You put “We are a china […]

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SPF records and Payflow Link

EDIT – Update January 3, 2013: There was a bug in my previous SPF record below, that included “ip4:96.0.0.0/1”. That should have read “ip4:96.6.0.0/11”. Unfortunately the initial incorrect record allowed half the Internet to pass SPF tests, so it would be better to use the corrected version or edit this list to suit your tastes. […]

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Variable interpolation in Batch Files

Apparently it is possible to use variable interpolation in Windows batch files. @echo off set myVar=bob goto print_%myVar% echo ALICE :print_bob echo BOB Output is: BOB Useful for all kinds of things…

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Android sends read receipts automatically

I was surprised recently when someone responded to a read-receipt showing when I had read one of their messages. Like many others, I turned off Outlook’s option to send read receipts automatically many years ago. Since I had just changed Exchange 2010 mail providers, I assumed that I had missed this option and simply needed […]

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FVS338 dialup backup fails

If your Netgear FVS338 dialup backup is failing, you might have a firmware problem. Sometime after firmware 3.0.2-21 (and not fixed as of 3.0.7-24), the dialup interface connects and grabs an IP address – it even allows ping, traceroute, and DNS lookups from the FVS338 web interface – but it will not route any traffic […]

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Munin and High Loads

Munin, while a great monitoring tool, can be a little bit of a CPU hog. I had installed it awhile back and looked at the graphs just for fun now and then (I’m lucky, my servers are humming along pretty smoothly), but I started noticing load averages were measurably higher than they were before I […]

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Motorola Xoom USB Dock

I took the stock Motorola Xoom dock (the cheaper one, not the speaker dock) and modded it to provide a USB link to the PC. The mod does not destroy the dock, but it does render the audio-out jack unusable until the mod is reverted. I don’t care about audio-out on my dock, but I […]

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Google Hacking Me

Update: they haven’t done this in awhile now – maybe they stopped this behavior (October 2011). (original post follows) I know this is probably under the radar for most people, but Google, who says “do no evil” tries to hack web sites on a regular basis. Last night, Googlebot (more specifically the host “crawl-66-249-68-246.googlebot.com”) tried […]