ROR31 体验-3 mail server
install mail server

sudo apt-get install postfix

sudo apt-get install heirloom-mailx

http://wiki.ubuntu.org.cn/PostfixBasicSetupHowto

* Action Mailer Configuration

As Action Mailer now uses the Mail gem, this becomes as simple as adding to your config/environments/env.rb file:
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address => "smtp.gmail.com",
:port => 587,
:domain => 'baci.lindsaar.net',
:user_name => '<username>',
:password => '<password>',
:authentication => 'plain',
:enable_starttls_auto => true }