Redmine

Help me please.
How to enable tls support in redmine?

this link is dead:
git://github.com/collectiveidea/action_mailer_optional_tls.git

1. File: config/email.yml
   production:
   delivery_method: :smtp
   smtp_settings:
   tls: true
   address: "smtp.gmail.com"
   port: '587'
   domain: "smtp.gmail.com"
   authentication: :plain
   user_name: "redmine@sirius.if.ua"
   password: "password"

development:
delivery_method: :smtp
smtp_settings:
tls: true
address: "smtp.gmail.com"
port: '587'
domain: "smtp.gmail.com"
authentication: :plain
user_name: "your_email@gmail.com"
password: "your_password"

test:
delivery_method: :test

P.S. I use google apps for mail at sirius.if.ua