Mountain Lion

Posted on July 26th, 2012 by Luke Sheldrick.
Categories: IT / Tech.
Tags: , , , , , , , , , , .

26 07 2012

So, Mountain Lion came out yesterday. I bought Apple’s new Macbook Pro with Retina, so am entitled to a free upgrade.

Applied for the redemption code, had to give a load of info, like purchase date, serial number..etc (not quite sure why, surely Apple can check this against my AppleID). Anyhow, they send you out a password and a password protected PDF in separate mails. Received mine within the hour, go to use it, and it informs me the code has already been used. Took a look on twitter, and seems everyone was in the same boat. According to numerous reports, Apple Support are saying to wait 72 hours, when a new code will automatically be issued.

I’m sorry, but that just sucks. I buy their top of the range laptop (well as well as most other things), and now I have to wait for the new shiny! Boo. I have a MacMini I use in my home office, which I’ve read mixed reports if the upgrade code would work for, so decided to just pay for the upgrade, as I’ll probably have to anyway for the MacMini, and I can use that on multiple machines.

Upgrade was pretty painless, a few things are broken, whilst developers update their code (and more importantly, make it work within the App Sandbox). I was reading up on PowerNap, as this is one feature that I think is really cool. My MBP will update, backup..etc when in standby. The default is to have this disabled when on battery power – however I wanted to ensure that was the case. According to the Apple KB, it’s in Power settings, and then in the Battery tab. I don’t have that. OK, so I need a SMC update before I can enable PowerNap. Great – for their latest, flagship MacBook, it’s ‘coming soon’.


Noticed a few things are broken so far:
TruePreview – Stops mails being marked as read in Mail. Manual Fix Here.
GPGMail – PGP/GPG for Mail. Broken at current – devs say to follow their twitter.
Hal9000 Screensaver – As it says on the tin.


Mail Issues, it’s all a matter of time.

Posted on December 9th, 2007 by Luke Sheldrick.
Categories: IT / Tech.
Tags: , , .

9 12 2007

Last week, I started working on a new mail platform. I had in place, an Exchange 2003 box at home, and a backup mail server running Exim, based in Global Switch London.

I utilised Greylisting on both, however found the linux version ten times better. So set myself a task to setup a new front end, in front of my main Exchange box. Ruled out getting rid of it totally, as I personally prefer the features of Exchange (Push mail, calanders…etc).

So I setup a virtual machine (CentOS 4.4) on one of my virtual hosts, configured exim, with greylisting, and to relay all mail to my domains, to the internal IP of my Exchange box. I also wanted to setup a test Exchange 2008 box at the same time, so anything to my development domain, would go to a different internal IP.

After a few tweaks, magically it all worked… until I started to get NDR’s  stating that mail was being delayed to my domain. A few telnet tests later, discovered that if you connected from a host with no rDNS, my mail server took 30 seconds to time out doing a reverse DNS check. Many mail servers would have timed out by this time. A quick tweak of my exim config to lower the DNS time out, from 30 seconds to 5, cured the problem.

For anyone wanting to do this, edit the exim.conf lines

rfc1413_hosts = *
rfc1413_query_timeout = 30s


rfc1413_hosts = *
rfc1413_query_timeout = 5s


1 of 11