Install postfix

[mathieuhays]

I'm having an issue sending emails from my dev installation.

Error message:
sh: 1: /usr/sbin/sendmail: not found

It happens when the php mail function is called.

The solution for this seems to install postfix (apt-get install postfix).

I would send a pull-request for this but I don't know much about chef :-/

[josegonzalez]

package 'postfix'

Would be good to put that somewhere where mail seems to be managed in the cookbooks :)