No errors in development.log, but mail wouldn't be sent - ruby-on-rails

Question

I use ActionMailer to send my email through Rails, but I can't receive anything.
My development.log said:
Sent mail to mymail#gmail.com (2107ms)
Date: Wed, 07 Dec 2011 17:14:30 +0800
From: no-reply
To: mymail#gmail.com
Message-ID: <4edf2e765a139_147105390c874e3#raincole-laptop.mail>
Subject: Reset password instructions
Mime-Version: 1.0
Content-Type: text/html;
charset=UTF-8
Content-Transfer-Encoding: 7bit
<p>
Hello mymail#gmail.com!
</p>
<p>Someone has requested a link to change your password, and you can do this through the link below.</p>
<p>Change my password</p>
<p>If you didn't request this, please ignore this email.</p>
<p>Your password won't change until you access the link above and create a new one.</p>
But there is nothing new in my inbox or spam box.
I have set:
ruby-1.9.2-p290 :008 > Rails.application.config.action_mailer[:raise_delivery_errors]
=> true
So, how can I see the real error logs to debug?
Edit:
I write a email.yml:
development:
reply: "no-reply"
host: "starfish.dev"
smtp:
address: "smtp.gmail.com"
port: 587
domain: "starfish.dev"
authentication: "plain"
user_name: "mymail#gmail.com"
password: "mypassword"
enable_starttls_auto: true
Then in application.rb:
$EMAIL_CONFIG = ActiveSupport::HashWithIndifferentAccess.new YAML.load(File.open("#{Rails.root}/config/email.yml"))[Rails.env]
config.action_mailer.smtp_settings = $EMAIL_CONFIG[:smtp].symbolize_keys if !$EMAIL_CONFIG[:smtp].nil?
in development.rb:
config.action_mailer.delivery_method = :smtp
config.action_mailer.raise_delivery_errors = true
config.action_mailer.perform_deliveries = true
But, it still just sends to log file, no to real address.

Answer 1

The development and test environments don't use real mailers (unless you specifically configure them). By default it just does exactly what you have noticed: it goes through all the motions of sending an email... but then doesn't actually send it, just logs the email that would have been sent.
EDIT: note that this is a reply to the original question, which did not contain any smtp settings.

Answer 2

have you tried telnet smtp.yoursite.com 587?
if there's no responding, please check your firewall.