Don't forget to use the optimalisation settings. If you do so you can also set the environment file you'll need later on. To edit the configuration of your Redmine installation on apache web server run:
sudo vi /etc/apache2/sites-available/default
I didn't get the Passenger optimalisation properties to work since I didn't follow the guide for ubuntu 11.10 installation.
Then we need to configure Redmine to use your gmail account. For this will have to install an .rb file in the lib directory. Install curl to get the file using:
sudo apt-get install curl
Next navigate to the lib directory of your Redmine installation, default location is /usr/share/redmine and there fetch the script. Copy the URL to the raw file from https://gist.github.com/44466 to use instead of URL_TO_RAW_FILE in the following command:
sudo curl URL_TO_RAW_FILE
sudo mv 44466 smtp_tls.rb
Update production.rb file (or whatever environment you're on) for use with gmail. This file is located at /usr/share/redmine/config/environments/production.rb . This is where we point to this new file in the lib directory.
Finally update the email.yml file to match your gmail settings. For me this file was located at /etc/redmine/default/email.yml and this was the required content:
Now you're ready to restart Redmine for the changes to take effect
sudo /etc/init.d/apache2 restart
If you're done with that you can go to your Redmine installation using your browser. Login with an admin account and go to Administration > Settings selecting the tab Email notifications. This is where you can configure what you want to use the notifications for. At the bottom there is also a link to send a test e-mail.
So you' re done. The resources I used: