November 2014 – Dan Langille's Other Diary

Nov 16 2014

Postfix SMTP server: errors – TLS not available due to local problem

Leave a Comment / Postfix / By Dan Langille / November 16, 2014

Postfix has been trying to tell me something: your configuration is wrong. Most cleverly, Postfix has been emailing me about this. The first email came on 22 Oct 2014. I ignored it. The second email arrived five days later on 27 October 2014: I recall looking around, but I didn’t do anything. I think I found an error in the logs but didn’t have time to fix it. A few days ago, another […]

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Wireless Diagnostics on OSX – check your wifi

I wanted to know how many wireless access points (WAPs) were using what channels near my place. I googled and found a reference to the built-in OSX tool, Wireless Diagnostics. But to be fair, the app is hidden. To access the app, hold the Command key while clicking on the WIFI icon. This will change what usually appears: Now click on Wireless Diagnostics. The following should appear. This is the boring part. Not