Sorry that I’m later than I’m supposed to be with this blogpost, but my new day job needs all the attention at the moment. The good news is there are not much problems when you update your Mac with the latest security update. Read more about it in Apple’s Knowledge base article.

On Leopard there is a small known issue with postfix. To correct it comment out or delete the following line from ‘/etc/postfix/main.cf‘:

inet_interfaces = localhost

Restart postfix (reloading config does not work) with:

sudo postfix stop
sudo postfix start

And all should be fine. If you find another issue please use the comments.